Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1979_11_a13, author = {E. V. Rzhavinskaya}, title = {Mean approximation of functions by {Fourier--Laguerre} sums}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {87--93}, publisher = {mathdoc}, number = {11}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1979_11_a13/} }
E. V. Rzhavinskaya. Mean approximation of functions by Fourier--Laguerre sums. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1979), pp. 87-93. http://geodesic.mathdoc.fr/item/IVM_1979_11_a13/