%0 Journal Article %A V. A. Berezin %T Before getting around to do black hole physics... %J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences %D 2013 %P 138-172 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSGTU_2013_4_a13/ %G en %F VSGTU_2013_4_a13