@book{12149,
	author = {Zlatev, Zahari and Others and Wasniewski, Jerzy ; jt. auth.},
	title = {Y 12 M solution of large and sparse systems of linear algebraic equations; documentation of subroutines},
	publisher = {Springer-Verlag},
	year = {1981},
	series = {Lecture notes in Computer Science},
	address = {Berlin}
}