@book{58443,
	author = {Hristova, Snezhana G. and ebrary, Inc.},
	title = {Qualitative investigations and approximate methods for impulsive equations},
	publisher = {Nova Science Publishers, Inc.,},
	year = {c2009.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10676677}
}