@article{FAA_1982_16_3_a22,
     author = {S. L. Tabachnikov},
     title = {Invariant differential operators of general position},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {86--87},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1982_16_3_a22/}
}