@article{10_4064_sm_25_2_207_215,
     author = {H. Ratajski},
     title = {On the convergence of orthogonal series of polynomials},
     journal = {Studia Mathematica},
     pages = {207--215},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1964},
     doi = {10.4064/sm-25-2-207-215},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-25-2-207-215/}
}