@article{AL_1988_27_1_a2,
     author = {Nguyen Van Hoa},
     title = {$L$-equivalence of systems of functions in many-valued},
     journal = {Algebra i logika},
     pages = {37--47},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1988_27_1_a2/}
}