@article{FPM_2012_17_1_a2,
     author = {E. M. Vechtomov and I. V. Lubyagina},
     title = {Cyclic semirings with idempotent noncommutative addition},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {33--52},
     year = {2012},
     volume = {17},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2012_17_1_a2/}
}