@article{TVP_1975_20_4_a20,
     author = {V. I. Rotar'},
     title = {On the distribution of a~quadratic form of many random variables},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {900--902},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1975_20_4_a20/}
}