Problem with accents in .Bib file

Question

I've been trying to find the source of problem without success, It keeps coming.

I'm trying to move from writing linear to modular, since the notes are getting bigger, so I'm using the subfile package. And since this, everything went wrong with the bibliography because all the special characters of the .bib aren't shown, I keep getting the Finished with exit code 1. Whereas working linearly it didn't happen. Even though the preamble is the same for both.

The main.tex looks like this

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[activeacute,spanish]{babel} %Since I'm writing in spanish I need it!
\usepackage[T1]{fontenc} %Even using this, It didn't work
 \usepackage{subfiles} %To work modular
 \usepackage{amsmath, amsthm, amssymb, amsfonts}
 \usepackage{longtable,array,tabularx,booktabs,lscape}
 \usepackage{mathtools}
 \usepackage{fancyhdr} 
 \usepackage{vmargin} 
 \usepackage{float} 
 \usepackage{graphicx} 
 \usepackage{color} 
 \usepackage{multicol} 
 \usepackage{tcolorbox} 
 \usepackage{accents} 
 \usepackage{cancel} 
 \usepackage{lmodern}
 \usepackage{hyperref} 
 \setcounter{tocdepth}{2} %Since I just have subsections in the whole doc
%Just config of the table of contents
\hypersetup{
colorlinks=true, 
linktoc=all,     
linkcolor=magenta,  
}
%New Enviroments   
\newtheorem{Def}{{Definición}}[subsection]
\newtheorem{Lema}{{Lema}}[subsection]
\newtheorem{Obs}{{Observación}}[subsection]
\newtheorem{Prop}{{Proposición}}[subsection]
\newtheorem{Teo}{{Teorema}}[subsection]
% To work with  vmargins
\setpapersize{A4}
\setmargins{2 cm}       
{1.5cm}                        
{16 cm}                      
{23.42cm}                    
{15pt}                          
{1cm}                          
{1pt}                             
{1cm}                           
%Page Style
\pagestyle{fancy}
\lhead{\bfseries Notes }
\chead{}
\rhead{}
\lfoot{ }
\rfoot{}
\cfoot{\thepage}
\renewcommand{\headrulewidth}{0.2pt}
\renewcommand{\footrulewidth}{0.10pt}


%NEW COMMANDS
\newcommand{\norm}[1]{\left\lVert #1\right\rVert}
\newcommand{\R}{\mathbb{R}}
\newcommand{\W}{\mathbb{W}}
\newcommand{\V}{\mathbb{V}}
\newcommand{\N}{\mathbb{N}}
\newcommand{\ra}{\rightarrow}
\newcommand{\rra}{\rightrightarrows}
\newcommand{\bb}[1]{\mathbb{#1}}
\newcommand{\al}[1]{\mathcal{#1}}
\DeclarePairedDelimiter\abs{\lvert}{\rvert}%
\renewcommand{\baselinestretch}{1.5}


\begin{document}
\sffamily
\tableofcontents

\newpage
\subfile{Section1}
\subfile{Section2}
\subfile{Section3}
\subfile{Section4}
\subfile{Section5}
\subfile{Section6}


\clearpage
\bibliographystyle{unsrt}
\nocite{*}
\bibliography{./AMBib}


\end{document}

On the other hand, my .bib document looks like this:

@book{OM,
Author = {Ó Searcóid,Mícheál},
Publisher = {Springer Verlag London Limited},
Title = {Metric Spaces},
Year = {2007}
}

@book{PM,
Author = {Pedro J. Miana },
Publisher = {Departamento de Matemáticas, Universidad de Zaragoza   },
Title = {Curso de Análisis Funcional: Notas de Clase},
Year = {2006},
}


@book{PJHP,
Author = {Pedro Jose Herrero Piñeyro  },
Publisher = {Universidad de Murcia},
Title = {Topología de Espacios Métricos},
Year = {2010},
}

@book{Kolmorov,
Author = {A. N. Kolmogorov , S. V. Fomin },
Publisher = {Editorial Mir},
Title = {Teoria de las ecuaciones y del análisis funcional },
Year = {1975},
}

@book{Jost,
Author = {Jürgen Jost },
Publisher = {Springer-Verlag Berlin Heidelberg},
Title = {Postmodern Analysis},
Year = {2005},
}

The problem isn't with the cross-reference or so, it does its job. The thing is for example that Ó Searcóid,Mícheál is shown without all the accented letters. I know that I can change every special character, for example Jürgen to J\"{u}rgen as well as for the others, but I had no problem before (working linearly). Is there something that am I missing?

Thanks in advance.

Answer 1

In your case the best would be to use biblatex and biber instead of bibtex. Then you can write letters with accents in your bib file which will be printed too.

Please see that you have to write two or more authors like this:

@book{Kolmorov,
  Author = {A. N. Kolmogorov and S. V. Fomin },

To concatenate two or more authors use and instead of your used ,!

To call biblatex and name the used bib file (here \jobname.bib, because I used package filecontents to have bib file and TeX code together in one compiling MWE) use

\usepackage{csquotes}
\usepackage[backend=biber]{biblatex} % <================================
\addbibresource{\jobname.bib}

Please see that option backend=biber requires biber instead bibtex.

To print the bibliography in the document use \printbibliography.

Please read the documentation of biblatex (texdoc biblatex) to customize it at your needs ...

With the following MWE (I deleted all packages not relevant for this problem)

\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@book{OM,
  Author = {Ó Searcóid, Mícheál},
  Publisher = {Springer Verlag London Limited},
  Title = {Metric Spaces},
  Year = {2007},
}
@book{PM,
  Author = {Pedro J. Miana },
  Publisher = {Departamento de Matemáticas, Universidad de Zaragoza   },
  Title = {Curso de Análisis Funcional: Notas de Clase},
  Year = {2006},
}
@book{PJHP,
  Author = {Pedro Jose Herrero Piñeyro  },
  Publisher = {Universidad de Murcia},
  Title = {Topología de Espacios Métricos},
  Year = {2010},
}
@book{Kolmorov,
  Author = {A. N. Kolmogorov and S. V. Fomin },
  Publisher = {Editorial Mir},
  Title = {Teoria de las ecuaciones y del análisis funcional },
  Year = {1975},
}
@book{Jost,
  Author = {Jürgen Jost },
  Publisher = {Springer-Verlag Berlin Heidelberg},
  Title = {Postmodern Analysis},
  Year = {2005},
}
\end{filecontents*}


\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[activeacute,spanish]{babel} %Since I'm writing in spanish I need it!
\usepackage[T1]{fontenc} %Even using this, It didn't work

\usepackage{csquotes}
\usepackage[backend=biber]{biblatex} % <================================
\addbibresource{\jobname.bib}

%\usepackage{vmargin} % outdated
\usepackage[a4paper]{geometry}

\usepackage{accents} 
\usepackage{lmodern}
\usepackage{hyperref} 
\setcounter{tocdepth}{2} %Since I just have subsections in the whole doc
%Just config of the table of contents
\hypersetup{
  colorlinks=true, 
  linktoc=all,     
  linkcolor=magenta,  
}

% To work with  vmargins
%\setpapersize{A4}
%\setmargins{2 cm}       
%{1.5cm}                        
%{16 cm}                      
%{23.42cm}                    
%{15pt}                          
%{1cm}                          
%{1pt}                             
%{1cm}                           


\begin{document}
\sffamily

\nocite{*}
%\bibliographystyle{unsrt}
%\bibliography{\jobname}
\printbibliography

\end{document}

you get the following result:

Answer 2

Same problem with name Wösten in the .bib file. It shows up corretly in Lyx and in Jabref bib file, but not in the generated bibliography at the end of the pdf.document. The only thing I had to do is change the name in

W"{o}sten

In the .bib file. For a few letters in the file is this perhaps the simplest solution. Since a bibfile is plain text, a few global replacements should suffice.