@article{6a5588529bc6498c9acc703b3798c735,
title = "Analysis of spectral points of the operators $T^{[*]}T$ and $TT^{[*]}$ in a Krein space",
abstract = "Spectra and sets of regular and singular critical points of definitizable operators of the form T",
author = "A.C.M. Ran and M. Wojtylak",
year = "2009",
doi = "10.1007/s00020-009-1654-5",
language = "English",
volume = "63",
pages = "263--280",
journal = "Integral Equations and Operator Theory",
issn = "0378-620X",
publisher = "Birkhauser Verlag Basel",
}