@article{ZNSL_2011_389_a0,
     author = {R. V. Bessonov},
     title = {The future and past wave operators on the singular spectrum},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--20},
     publisher = {mathdoc},
     volume = {389},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2011_389_a0/}
}