@article{TMF_1992_93_2_a6,
     author = {E. Nissimov and S. Pacheva},
     title = {$W_\infty$ {\textendash} a~geometric approach},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {273--285},
     year = {1992},
     volume = {93},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_93_2_a6/}
}