@article{VMJ_2007_9_1_a4,
     author = {Yu. F. Korobeinik},
     title = {On the zeros of a class of harmonic functions},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {48--55},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2007_9_1_a4/}
}