1. On a superlinear S-L equation and a related bouncing problem;De Figueiredo;J. Reine Angew Math.,1991
2. Linear Operators, Parts I;Dunford,1958
3. Solvability of a BVP with the nonlinearity satisfying a sign condition;Gupta;J. Math. Anal. Appl.,1989
4. Nonlinear two point BVPs at resonance without Landesman–Lazer condition;Iannacci;Proc. Amer. Math. Soc.,1989
5. Solvability of a class of semilinear two point BVPs at resonance;Ruyun;Acta Math. Sinica,1993