@article{TIMM_2012_18_1_a9,
     author = {V. P. Vereshchagin and Yu. N. Subbotin and N. I. Chernykh},
     title = {Statement and solution of a~boundary value problem in the class of planar-helical vector fields},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {123--138},
     year = {2012},
     volume = {18},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_1_a9/}
}