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2. Temperature distribution in a convex solid with nonlinear radiation boundary condition;Olmstead;J. Math. Mech.,1966
3. Positive solutions of a class of nonlinear eigenvalue problems;Cohen;J. Math. Mech.,1967
4. Positive solutions of nonlinear eigenvalue problems: Applications to nonlinear reactor dynamics;Cohen;Arch. Rat. Mech. Anal.,1967