@article{DAN_1970_190_2_a14,
     author = {A. Z. Petrov},
     title = {Sample-modelling of {Sun's} gravitational field},
     journal = {Doklady Akademii Nauk},
     pages = {305--308},
     year = {1970},
     volume = {190},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_190_2_a14/}
}