1. G. Akagi, J. Kobayashi, M. Ôtani, Principle of symmetric criticality and evolution equations, in: W. Feng, X. Lu (Eds.), Dynamical Systems and Differential Equations (Proc. Wilmington, 2002), expanded volume of Discrete Contin. Dyn. Syst. 2003, pp. 1–10.
2. Accretivity and duality map in Banach space;Asakawa;Proc. Japan Acad. Ser. A Math. Sci.,1984
3. Restriction of maximal monotone operator to closed linear subspace;Asakawa;TRU Math. (SUT J. Math.),1987
4. Averaged norms;Asplund;Israel J. Math.,1967
5. Nonlinear Semigroups and Differential Equations in Banach spaces;Barbu,1976