@article{02227259,
title = {On an equation with partial derivations in four-dimensional Euclidean space.},
journal = {Lobachevskii Journal of Mathematics},
volume = {17},
year = {2005},
pages = {151-175},
zbl = {1084.35016},
language = {en},
url = {http://dml.mathdoc.fr/item/02227259}
}
Utkina, E.A. On an equation with partial derivations in four-dimensional Euclidean space.. Lobachevskii Journal of Mathematics, Tome 17 (2005) pp. 151-175. http://gdmltest.u-ga.fr/item/02227259/