1. An extension of maximum and antimaximum principles to a Schrödinger equation in R2;Alziary;J. Differential Equations,1991
2. Principal eigenvalues for problems with indefinite weight function on RN;Brown;Proc. AMS,1990
3. Global bifurcation results for a semilinear elliptic equation on all of Rn;Brown;Duke Math. J.,1996
4. Existence of solutions for systems involving operators on divergence forms;Cardoulis;Electron. J. Differ. Equ. Conf.,2007
5. Abstract evolution equations, periodic problems and applications;Daners;Longman Research Notes,1992