@article{SF_1991__43_3_135103,
     author = {V.B. Shteinbuk and A.P. Sostak},
     title = {On semigroups of continuous transformations on fuzzily structured sets.},
     journal = {Semigroup forum},
     pages = {135--145},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1991},
     zbl = {0761.54006},
     url = {http://geodesic.mathdoc.fr/item/SF_1991__43_3_135103/}
}