@article{FPM_2003_9_3_a1,
     author = {I. I. Bogdanov},
     title = {Hidden matrix semirings},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {13--19},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2003_9_3_a1/}
}