References
- L. K. Jackson and K. Schrader, Subfunction and third order differential inequalities, J. Differential Equation 8 (1970), 180-194. https://doi.org/10.1016/0022-0396(70)90044-6
- P. Hartman,Ordinary Differential Equations, Wiley,New York, 1964.
- G. A. KlasenDifferential inequalities and existence theorems for second and third order boundary value problems, J. Differential Equation 10 (1971), 529-537. https://doi.org/10.1016/0022-0396(71)90010-6
- Gao Yongxin, Existence of solutions of nonlinear two-point boundary value problems for 4nth-order nonlinear differential equation, J.Harbin Institute of Technology (New Series) 4 (2002), 424 - 428.
- Wang Jinzi, Existence of solutions of nonlinear two-point boundary value problems for third order nonlinear differential equations, Northeast Math.J. 7 (1991), 181-189.