@article{ZNSL_1983_126_a8,
     author = {L. N. Dovbysh},
     title = {On special quadratic maps},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {73--76},
     publisher = {mathdoc},
     volume = {126},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_126_a8/}
}