@article{MZM_1989_45_1_a17,
     author = {S. S. Samarova and K. L. Samarov},
     title = {On the existence of analytic integrals in a three-dimensional problem of $n$ fixed centers},
     journal = {Matemati\v{c}eskie zametki},
     pages = {134--136},
     publisher = {mathdoc},
     volume = {45},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_45_1_a17/}
}