@article{FAA_1983_17_3_a3,
     author = {O. V. Lyashko},
     title = {Classification of critical points of functions on a manifold with singular boundary},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {28--36},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_3_a3/}
}