@article{FAA_1983_17_4_a2,
     author = {M. A. Semenov-Tian-Shansky},
     title = {What is a classical $r$-matrix?},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {17--33},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_4_a2/}
}