SPECTRAL PROPERTIES OF NONCOMMUTING OPERATORS
2004 年出版185 页ISBN:9783540219231;3540219234
THE ADJOINT OF A SEMIGROUP OF LINEAR OPERATORS
1992 年出版195 页ISBN:350562605;0387562605
STABLE APPROXIMATE EVALUATION OF UNBOUNDED OPERATORS
2007 年出版132 页ISBN:9783540399421