%0 Journal Article %A A. N. Bakhvalov %T On local behaviour of multi-dimensional harmonic variation %J Izvestiya. Mathematics %D 2006 %P 641-660 %V 70 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2006_70_4_a0/ %G en %F IM2_2006_70_4_a0