@article{TMF_1981_46_3_a0,
     author = {Yu. M. Shirokov},
     title = {Representation of free solutions for {Schr\"odinger} equations with strongly singular concentrated potentials},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {291--299},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1981_46_3_a0/}
}