@article{ISU_2015_15_1_a1,
     author = {D. A. Bredikhin and A. V. Popovich},
     title = {On variety of semigroups of relations with operation of reflexive double cylindrification},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {13--22},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2015_15_1_a1/}
}