@article{TMF_2000_123_3_a5,
     author = {I. D. Mandzhavidze and A. N. Sisakyan},
     title = {Perturbation theory in the neighborhood of extended objects},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {433--451},
     publisher = {mathdoc},
     volume = {123},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_123_3_a5/}
}