@article{ZNSL_1985_146_a2,
     author = {A. N. Kirillov and V. E. Korepin},
     title = {Norm of bound states},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {20--30},
     publisher = {mathdoc},
     volume = {146},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1985_146_a2/}
}