@article{TMF_1999_119_2_a4,
     author = {I. Yu. Popov and D. A. Zubok},
     title = {Two physical applications of the {Laplace} operator perturbed on a null set},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {295--307},
     publisher = {mathdoc},
     volume = {119},
     number = {2},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_119_2_a4/}
}