@book{73365,
	author = {Kisa�canin, Branislav, and ebrary, Inc.},
	title = {Mathematical problems and proofs},
	publisher = {Plenum Press,},
	year = {c1998.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10046995}
}