You can use sortkey or presort to sort a particular entry before all others. With sorting=nyt you could use presort={0}.
@book{aardvark,
author = {Aardvark, Anne},
titel = {Now, this is Aardvark},
year = {2012},
}
@book{wombat,
author = {Wombat, Wilbur},
titel = {This is Wombat},
year = {2017},
presort = {0},
}
I can, however, not recommend just (seemingly arbitrarily) seamlessly sorting one entry out of order before all others.
You could instead split the bibliography.
Statically via keywords in the .bib file
@book{aardvark,
author = {Aardvark, Anne},
titel = {Now, this is Aardvark},
year = {2012},
keywords = {secondary},
}
@book{wombat,
author = {Wombat, Wilbur},
titel = {This is Wombat},
year = {2017},
keywords = {primary},
}
and filter
\printbibheading
\printbibliography[keyword=primary, heading=subbibliography, title={Primary}]
\printbibliography[keyword=secondary, heading=subbibliography, title={Secondary}]
You could also only set keywords for primary and filter all others via notkeyword.
\printbibliography[keyword=primary]
\printbibliography[notkeyword=primary]
Or dynamically via categories
\DeclareBibliographyCategory{important}
\addtocategory{important}{wombat}
\printbibheading
\printbibliography[category=important, heading=subbibliography, title={Primary}]
\printbibliography[notcategory=important, heading=subbibliography, title={Secondary}]
There are even more possibilities to split the bibliography, for example by author biblatex: separating publications of a specific author in the bibliography
backend=bibtexwithbiblatexany more. You should usebiber. But what you're asking seems like a very odd thing to do. But it's common to separate things into primary and secondary sources, and this is easy to do withbiblatex. See Simple way of setting up two bibliographies and biblatex: separating publications of a specific author in the bibliography. The latter approach can be applied to any category, not just authors. – Alan Munn May 23 '17 at 00:04sortyearentryfield, setting, let's say,sortyear = {1500},in your girlfriend's thesis bibentry. – gusbrs May 23 '17 at 03:06