@article{PFMT_2011_3_a13,
     author = {O. I. Tavgen' and D. Junhua and L. Chunyan},
     title = {The representation image unipotency of the group $F_2$ by mapping primitive elements into unipotent matrices with small {Jordan} blocks},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {81--83},
     publisher = {mathdoc},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2011_3_a13/}
}