1 J. Sun, "Three positive solutions for second-order Neumann boundary value problems" 17 : 1079-1084, 2004
2 D. Jiang, "The monotone method for Neumann functional differential equations with upper and lower solutions in the reverse order" 67 : 2815-2828, 2007
3 D. D. Hai, "Positive solutions to a class of elliptic boundary value problems" 227 : 195-199, 1998
4 M. Krasnosel'skii, "Positive solutions of operator equations" Noordhoff 1964
5 J. Chu, "Positive solutions of Neumann problems with singular-ities" 337 : 1267-1272, 2008
6 Y. Sun, "Positive solutions for singular second order Neu-mann boundary value problems via a cone fixed point theorem" 210 : 80-86, 2009
7 R. Ma, "Nonlinear periodic boundary value problems with sign-changing Green's func-tion" 74 : 1714-1720, 2011
8 K. Deimling, "Nonlinear functional analysis" Springer-Verlag 1985
9 J. Sun, "Multiple positive solutions to second-order Neumann boundary value problems" 146 : 187-194, 2003
10 Z. Li, "Existence of positive solutions of superlinear second-order Neumann boundary value problem" 72 : 3216-3221, 2010
1 J. Sun, "Three positive solutions for second-order Neumann boundary value problems" 17 : 1079-1084, 2004
2 D. Jiang, "The monotone method for Neumann functional differential equations with upper and lower solutions in the reverse order" 67 : 2815-2828, 2007
3 D. D. Hai, "Positive solutions to a class of elliptic boundary value problems" 227 : 195-199, 1998
4 M. Krasnosel'skii, "Positive solutions of operator equations" Noordhoff 1964
5 J. Chu, "Positive solutions of Neumann problems with singular-ities" 337 : 1267-1272, 2008
6 Y. Sun, "Positive solutions for singular second order Neu-mann boundary value problems via a cone fixed point theorem" 210 : 80-86, 2009
7 R. Ma, "Nonlinear periodic boundary value problems with sign-changing Green's func-tion" 74 : 1714-1720, 2011
8 K. Deimling, "Nonlinear functional analysis" Springer-Verlag 1985
9 J. Sun, "Multiple positive solutions to second-order Neumann boundary value problems" 146 : 187-194, 2003
10 Z. Li, "Existence of positive solutions of superlinear second-order Neumann boundary value problem" 72 : 3216-3221, 2010
11 J. R. Graef, "A periodic boundary value problem with vanishing Green's function" 21 (21): 176-180, 2008
12 A. Boscaggin, "A note on a superlinear indefinite Neumann problem with multiple positive solutions" 377 : 259-268, 2011