1. A ⩾ B ⩾ 0 assures (BrApBr)1/q ⩾ B(p+2r)/q for r ⩾ 0, p ⩾ 0, q ⩾ 1with (1+2r)q ⩾ p + 2r;Furuta;Proc. Amer. Math. Soc.,1987
2. E. Kamei, Furuta's inequality via operator means, Math. Japon., to appear.
3. Means of positive linear operators;Kubo;Math. Ann.,1980
4. Some operator monotone functions;Pedersen;Proc. Amer. Math. Soc.,1972