@article{ZNSL_1978_76_a6,
     author = {R. M. Kaufman},
     title = {A. {F.~Lavrik's} truncated equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {124--158},
     year = {1978},
     volume = {76},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_76_a6/}
}