@article{TMF_1999_121_1_a5,
     author = {A. M. Semikhatov},
     title = {Free-field resolutions of unitary representations of the $N=2$ {Virasoro} {algebra:~I}},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {89--109},
     publisher = {mathdoc},
     volume = {121},
     number = {1},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_121_1_a5/}
}