@article{FAA_1997_31_2_a8,
     author = {V. M. Zakalyukin},
     title = {Singularities of {Circle-Surface} {Contacts} and {Flags}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {73--76},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1997_31_2_a8/}
}