@article{MV_1977_29_1_a47,
     author = {P. R. Lazov},
     title = {Ob odnom nelinejnom differencial'nom uravnenii},
     journal = {Matemati\v{c}ki vesnik},
     pages = {387 },
     year = {1977},
     volume = {29},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1977_29_1_a47/}
}