@article{DAN_1981_259_1_a7,
     author = {V. P. Motornyi},
     title = {Approximation in the mean of functions by {Fourier--Legendre} sums},
     journal = {Doklady Akademii Nauk},
     pages = {39--42},
     publisher = {mathdoc},
     volume = {259},
     number = {1},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_259_1_a7/}
}