@article{DAN_1976_230_5_a4,
     author = {M. M. Lavrent'ev and M. A. Atakhodzhaev},
     title = {Cauchy problems for a complete evolution equation of second order},
     journal = {Doklady Akademii Nauk},
     pages = {1033--1034},
     publisher = {mathdoc},
     volume = {230},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_230_5_a4/}
}