%0 Journal Article %A I. D. Mandzhavidze %A A. N. Sisakyan %T Perturbation theory in the neighborhood of extended objects %J Teoretičeskaâ i matematičeskaâ fizika %D 2000 %P 433-451 %V 123 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2000_123_3_a5/ %G ru %F TMF_2000_123_3_a5