Spectral theory in inner product spaces and applications : 6th workshop on operator theory in krein spaces and operator polynomials, Berlin, December 2006 / ed. J. Behrndt, 2009 r=on-line. - Текст : электронный.
Recent advances in operator theory in Hilbert and Krein spaces / ed. J. Behrndt, 2010 r=on-line. - Текст : электронный.