Bibliography "?"

Question

I am writing an article and when i generate the bibliography i can't see it in the article. The result when I cite an author is : "?".

I don't know how i could fix it, anyone could help me?

Thank you! Cheers!

The preamble is:

\documentclass[preprint,12pt,authoryear]{elsarticle}
\usepackage{multirow} 
\usepackage{graphicx}
\usepackage{siunitx}
\sisetup{detect-weight, detect-display-math}
\sisetup{detect-inline-weight=math}
\sisetup{mode=text,per-mode=symbol}
\usepackage{multirow}
\usepackage{makecell}
\usepackage{booktabs}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{pdflscape}
\pgfplotsset{compat=newest}
\usetikzlibrary{plotmarks}
\usetikzlibrary{arrows.meta}
\usepgfplotslibrary{patchplots}
\newlength\fwidth
\setlength{\fwidth}{0.8\textwidth}
\usepackage{tikzscale}
\pgfplotsset{plot coordinates/math parser=false}
\usepackage{overpic}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=1.15}
\usepackage{float}
\usepackage{natbib}
\usepackage[margin=2.5cm]{geometry}
\usepackage{bicaption}
\usepackage{makecell}
\renewcommand\theadfont{\bfseries}
\renewcommand\theadgape{}
\usepackage[skip=1ex, labelfont=bf]{caption}
\usepackage[skip=0.333\baselineskip]{caption}
\usepackage{amssymb}
\bibliographystyle{model3-num-names} 

blablabla

\section*{References}
\bibliography{bilbiography}