@article{1102995082, author = {Brown, James R.}, title = {Approximation theorems for Markov operators.}, journal = {Pacific J. Math.}, volume = {19}, number = {3}, year = {1966}, pages = { 13-23}, language = {en}, url = {http://dml.mathdoc.fr/item/1102995082} }
Brown, James R. Approximation theorems for Markov operators.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 13-23. http://gdmltest.u-ga.fr/item/1102995082/