@article{ZNSL_1982_107_a6,
     author = {N. G. Makarov},
     title = {Sets of simply-invariance},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {104--135},
     publisher = {mathdoc},
     volume = {107},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1982_107_a6/}
}