@article{BUMI_1962_3_17_2_a0,
     author = {Singhai, B. C.},
     title = {Approximation to the generating function by the {Ces\`aro} means of its  ultraspherical series.},
     journal = {Bollettino della Unione matematica italiana},
     pages = {159--165},
     publisher = {mathdoc},
     volume = {Ser. 3, 17},
     number = {2},
     year = {1962},
     zbl = {0122.31203},
     mrnumber = {141916},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_1962_3_17_2_a0/}
}