This example shows how to create multiple bibliographies/reference lists in the same document, potentially from different .bib files, using the bibunits package.
For more information, see the bibunits documentation.
This document contains the template for scientific work (Bachelor/Master/Doctoral Theses) at the CoDiS Lab Graz from Graz University of Technology. Feel free to use and modify the template.
This template is based on the great work of Karl Voit.
This project demonstrates how the xr package can be used on Overleaf to resolve labels in other .tex files that have not been \include-d in the main file.
Make sure you enable the correct system call in latexmkrc, depending on the LaTeX engine you're using!
LianTze Lim (from an answer by cyberSingularity at http://tex.stackexchange.com/a/69832/226)