@article{AA_2019_31_1_a0,
     author = {M. I. Belishev and A. F. Vakulenko},
     title = {On algebras of harmonic quaternion fields in ${\mathbb R}^3$},
     journal = {Algebra i analiz},
     pages = {1--17},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2019_31_1_a0/}
}