@book{90112,
	author = {Khanna, Vijay K and Bhambri, S K; Khurana, Rohith; Iyengar, N Ch S N; Chandrasekaran, V M; Venkatesh, K A; Arunachalam},
	title = {Discrete mathematical structures},
	publisher = {Vikas Publishing House},
	year = {2015},
	address = {New Delhi}
}