@article{02247407,
title = {The Krein string and characteristic functions of non-self-adjoint operators.},
journal = {Zapiski Nauchnykh Seminarov POMI},
volume = {321},
year = {2005},
pages = {115-134},
zbl = {1107.47017},
language = {en},
url = {http://dml.mathdoc.fr/item/02247407}
}
Kostenko, A.S. The Krein string and characteristic functions of non-self-adjoint operators.. Zapiski Nauchnykh Seminarov POMI, Tome 321 (2005) pp. 115-134. http://gdmltest.u-ga.fr/item/02247407/