@book{11093,
	author = {Polish Academy of Sciences, Institute of Mathematics and Ciesiclski, Zbigniew},
	title = {Approximation and function spaces; papers of the 27th semester which took place at the Stefan Banach International Mathematical center in Warsaw during Feb. 27-May 27 of 1986},
	publisher = {Polish Scientific Publishers,},
	year = {1989},
	series = {Banach Centre Publications},
	address = {Warszawa:}
}