@article{TMF_1993_95_2_a19,
     author = {A. Taormina},
     title = {Towards a classification of modular invariant partition functions for theories based on $N=4$ superconformal algebras},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {385--394},
     publisher = {mathdoc},
     volume = {95},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1993_95_2_a19/}
}