@article{10_4064_am28_3_2,
     author = {Waldemar Popi/nski},
     title = {On orthogonal series estimation of bounded
regression functions},
     journal = {Applicationes Mathematicae},
     pages = {257--270},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {2001},
     doi = {10.4064/am28-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am28-3-2/}
}