1. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables;Abramowitz,1964
2. Operator theory and harmonic analysis;Albrecht,1996
3. Examples of unbounded imaginary powers of operators;Baillon;J. Funct. Anal.,1991
4. The holomorphic functional calculus approach to operator semigroups;Batty;Acta Sci. Math. (Szeged),2013
5. Resolvent tests for similarity to a normal operator;Benamara;Proc. Lond. Math. Soc. (3),1999