@book{12697,
	author = {Krasnosel'skij, M. A. and Others and Lifshits, Je. A. ; jt. auth.},
	title = {Positive linear systems; the methods of positive operators},
	publisher = {Springer-Verlag},
	year = {1989},
	series = {Sigma series in Applied Mathematics},
	address = {Berlin},
	note = {"Tr. from the Russian by Jurgen Appell".}
}