@book{2509,
	author = {Kozlov, Vladimir, and Mazʹi͡a︡, V. G.},
	title = {Differential equations with operator coefficients :},
	publisher = {Springer,},
	year = {1999.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0815/98045573-d.html}
}