@article{FPM_2006_12_2_a2,
     author = {E. I. Bunina and A. V. Mikhalev},
     title = {Elementary equivalence of the semigroup of invertible matrices with nonnegative elements},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {39--53},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_2_a2/}
}