@misc{KUTGS_1997_23_a22,
     title = {Information on sessions of {Geometrical} {Seminar} of {Kazan} {University} (1990, {September} {\textendash} 1997, {June)}},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {250--254},
     year = {1997},
     volume = {23},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1997_23_a22/}
}