%0 Journal Article %A V. V. Makeev %T Triangular and quadrangular pyramids in a~three-dimensional normed space %J Zapiski Nauchnykh Seminarov POMI %D 2013 %P 42-50 %V 415 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2013_415_a6/ %G ru %F ZNSL_2013_415_a6