@article{ZNSL_1988_169_a12,
     author = {G. A. Pelts},
     title = {The space of states and wave equation for the boson string with non-trivial topology of the world surface},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {107--121},
     publisher = {mathdoc},
     volume = {169},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1988_169_a12/}
}