@article{ZNSL_2002_290_a6,
     author = {M. A. Nudelman},
     title = {The {Krein} string and characteristic functions of maximal dissipative operators},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {138--167},
     publisher = {mathdoc},
     volume = {290},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2002_290_a6/}
}