@article{FPM_2013_18_3_a2,
     author = {E. I. Bunina and V. V. Nemiro},
     title = {The group of fractions of the semigroup of invertible nonnegative matrices of order three over a~field},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {27--42},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_3_a2/}
}