%0 Journal Article %A A. Yu. Khrennikov %T The correspondence principle in quantum field theory and relativistic boson string theory %J Sbornik. Mathematics %D 1990 %P 209-233 %V 67 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1990_67_1_a12/ %G en %F SM_1990_67_1_a12