%0 Journal Article %A G. Kostyanev, S. %T Downward continuation of some stationary geophysical fields %D 1991 %J , %V %@ 2214-4609 %C cp-42-00176 %R https://doi.org/10.3997/2214-4609.201410918 %I European Association of Geoscientists & Engineers, %X %U https://www.earthdoc.org/content/papers/10.3997/2214-4609.201410918