https://km.wiktionary.org/wiki/engine

https://sm.wiktionary.org/wiki/engine

https://simple.wiktionary.org/wiki/engine

https://sv.wiktionary.org/wiki/engine

https://vec.wiktionary.org/wiki/engine

https://www.wikidata.org/wiki/Q19091519

https://en.wikisource.org/w/index.php?title=The_Kinematics_of_Machinery&oldid=13096171

http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007541043605171

https://www.bbc.co.uk/things/fdabddd2-2ee7-4f56-a9b6-12b51dfc1228

https://klexikon.zum.de/wiki/Maschine