@book {Ausiello99_approxbook,
	title = {Complexity and Approximation: Combinatorial Optimization Problems and Their Approximability Properties},
	year = {1999},
	publisher = {Springer-Verlag New York, Inc.},
	organization = {Springer-Verlag New York, Inc.},
	address = {Secaucus, NJ, USA},
	isbn = {3540654313},
	author = {Giorgio Ausiello and M. Protasi and A. Marchetti-Spaccamela and G. Gambosi and P. Crescenzi and V. Kann}
}
@book { Ausiello99_approxbook,
	title = {Complexity and Approximation: Combinatorial Optimization Problems and Their Approximability Properties},
	year = {1999},
	publisher = {Springer-Verlag New York, Inc.},
	organization = {Springer-Verlag New York, Inc.},
	address = {Secaucus, NJ, USA},
	isbn = {3540654313},
	author = {Giorgio Ausiello and M. Protasi and A. Marchetti-Spaccamela and G. Gambosi and P. Crescenzi and V. Kann}
}
