@article{CHEB_2014_15_3_a1,
     author = {E. M. Vechtomov and A. A. Petrov},
     title = {Variety of semirings generated by two-element semirings with commutative idempotent multiplication},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {12--30},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2014_15_3_a1/}
}