@article{10_4064_am_27_4_445_454,
     author = {Waldemar Popi\'nski},
     title = {Convergence rates of orthogonal series regression estimators},
     journal = {Applicationes Mathematicae},
     pages = {445--454},
     publisher = {mathdoc},
     volume = {27},
     number = {4},
     year = {2000},
     doi = {10.4064/am-27-4-445-454},
     zbl = {0992.62040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-27-4-445-454/}
}