@article{PFMT_2012_2_a10,
     author = {P. P. Veresovich},
     title = {The reflecting function of one two dimensional differential system},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {65--67},
     publisher = {mathdoc},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2012_2_a10/}
}