finding references in bibtex
https://uri-primo.hosted.exlibrisgroup.com/primo-explore/search?
google schoolar
-publisher jurnal : -ieee

https://tex.stackexchange.com/questions/143/what-are-good-sites-to-find-citations-in-bibtex-format:
http://www.ams.org/mref

https://git.macropus.org/citation-finder/