@article{MZM_2009_86_4_a13,
     author = {D. S. Telyakovskii},
     title = {A {Sufficient} {Condition} for the {Harmonicity} of {Functions} of {Two} {Variables}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {628--640},
     publisher = {mathdoc},
     volume = {86},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_86_4_a13/}
}