@article{FPM_2012_17_6_a3,
     author = {O. V. Markova},
     title = {The length function and matrix algebras},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {65--173},
     publisher = {mathdoc},
     volume = {17},
     number = {6},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2012_17_6_a3/}
}