@article{DAN_1995_345_6_a1,
     author = {A. V. Borovskikh and R. Mustafokulov and K. P. Lazarev and Yu. V. Pokorny},
     title = {On a class of fourth-order differential equations on a},
     journal = {Doklady Akademii Nauk},
     pages = {730--732},
     publisher = {mathdoc},
     volume = {345},
     number = {6},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_345_6_a1/}
}