@article{DAN_1989_308_6_a5,
     author = {S. N. Samborskii and A. A. Tarashchan},
     title = {Semirings that arise in multicriterial optimization problems and},
     journal = {Doklady Akademii Nauk},
     pages = {1309--1312},
     publisher = {mathdoc},
     volume = {308},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_6_a5/}
}