@article{RM_2008_63_6_a10,
     author = {E. M. Vechtomov and M. A. Lukin},
     title = {Semirings which are the unions of a~ring and a~semifield},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1152--1153},
     year = {2008},
     volume = {63},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2008_63_6_a10/}
}