@book{34554,
	author = {Sinha, Kalyan B. and Srivastava, Sachi   and Srivastava, Sachi},
	title = {Theory of semigroups and applications /},
	publisher = {Hindustan Book Agency},
	year = {2017},
	series = {Texts and readings in Mathematics},
	address = {New Delhi:}
}