@article{ZNSL_2013_419_a4,
     author = {A. E. Guterman and O. V. Markova and S. D. Sochnev},
     title = {Algebra of semimagic matrices and its length},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--76},
     publisher = {mathdoc},
     volume = {419},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_419_a4/}
}