@article{FPM_2016_21_1_a4,
     author = {E. I. Bunina and A. V. Mikhalev and V. V. Nemiro},
     title = {Groups of quotients of semigroups of invertible nonnegative matrices over skewfields},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {57--64},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2016_21_1_a4/}
}