1. Positive solutions of a class of nonlinear eigenvalue problems;Cohen;J. Math. Mech.,1967
2. Some positone problems suggested by nonlinear heat generation;Keller;J. Math. Mech.,1967
3. Newton's method for convex nonlinear elliptic boundary value problems;Schryer;Numer. Math.,1971
4. Some nonlinear eigenvalue problems;Shampine;J. Math. Mech.,1968
5. Supersolutions, monotone iterations, and stability;Amann;J. diff. Eqs.,1976