@book{9239,
	author = {Korovkin, P. P.},
	title = {Linear operators and approximation theory.},
	publisher = {Hindustan Pub. Corp.,},
	year = {1960.},
	series = {International monographs on advanced mathematics & physics},
	address = {Delhi,},
	note = {Translation of Lineĭnye operatory i teorii︠a︡ priblizheniĭ.}
}