@article{ADM_2012_13_1_a7,
     author = {L. A. Kurdachenko and K. O. Grin and N. A. Turbay},
     title = {On  hypercentral fyzzy groups},
     journal = {Algebra and discrete mathematics},
     pages = {92--106},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2012_13_1_a7/}
}