@article {31990,
	title = {Advances in Applied Mathematics},
	journal = {A proof of Rado{\textquoteright}s Theorem via principal extension},
	year = {2020},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-85080051198\&partnerID=MN8TOARS},
	author = {Geelen, J. and Sun, H.}
}
