共 50 条
- [4] NONZERO SOLUTIONS OF BOUNDARY-VALUE PROBLEMS FOR SECOND-ORDER ORDINARY AND DELAY-DIFFERENTIAL EQUATIONS [J]. NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1972, 19 (02): : A390 - A390
- [9] EXISTENCE OF POSITIVE SOLUTIONS OF BOUNDARY VALUE PROBLEMS FOR SECOND-ORDER FUNCTIONAL DIFFERENTIAL EQUATIONS ON INFINITE INTERVALS [J]. FIXED POINT THEORY, 2012, 13 (02): : 423 - 437