@book{19253,
	author = {Nikishin, E. M. and Sorokin, V. N. and Sorokin, V. N. ; jt. auth.},
	title = {Rational approximations and orthogonality},
	publisher = {American Mathematical Society},
	year = {1991},
	series = {Translations of Mathematical monographs},
	address = {Providence},
	note = {"Purchased under NBHM grant for the year 1999-2000"}
}