@book{37958,
	author = {Lipschutz, Seymour. and Lipson, Marc.},
	title = {Schaum's outline of theory and problems of discrete mathematics /},
	publisher = { Tata McGraw-Hill,},
	year = {c1997 [2001 reprint].},
	series = {Schaum's outline series},
	address = {New Delhi:},
	edition = {2nd ed.},
	note = {Includes index.}
}