1. Triangle inequalities in operator algebras;Akemann;Linear Multilinear Algebra,1982
2. Topics on Operator Inequality;Ando,1978
3. More operator versions of the Schwarz inequality;Bhatia;Comm. Math. Phys.,2000
4. Commutative Relations and Related Topics, vol. 1039;Enomoto,1998
5. Operator inequalities for Schwarz and Hua;Fujii;Sci. Math.,1999