Operator-valued inner product and operator inequalities. Fujii, Jun Ichi — 2008 Banach Journal of Mathematical Analysis [electronic only]
Continuously differentiable means. Fujii, Jun Ichi; Fujii, Masatoshi; Miura, Takeshi; Takagi, Hiroyuki; Takahasi, Sin-Ei — 2006 Journal of Inequalities and Applications [electronic only]