@article{TIMB_2011_19_2_a4,
     author = {P. P. Zabreiko and A. N. Tanyhina},
     title = {Matrix exponents and nilpotent algebras},
     journal = {Trudy Instituta matematiki},
     pages = {37--46},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2011_19_2_a4/}
}