@article{VSGTU_2009_1_a17,
     author = {l. A. Lyozin},
     title = {Approximation of {Double-dimensional} {Densities} of {Probabilities} by {Orthogonal} {Bases}},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {169--174},
     publisher = {mathdoc},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2009_1_a17/}
}