@book{11493,
	author = {Symposium on Approximation Theory, Universidade Estadual de Campinas (UNICAMP), Brazil, Aug. 1-5, 1977 and Prolla, Joao B.},
	title = {Approximation theory and functional analysis},
	publisher = {North-Holland,},
	year = {1979},
	address = {Amsterdam:}
}