Wang Youyu and Cui Yujiao and Li Yannan: Lyapunov-type inequalities for (m+1)th order half-linear differential equations with anti-periodic boundary conditions. (2015)
Wang Youyu and Tang Yantao and Zhao Meng: Multiple positive solutions for a nonlinear 2n-th order m-point boundary value problems. (2010)
Wang Youyu and Ge Weigao and Cheng Sui Sun: Positive solutions for a multi-point eigenvalue problem involving the one dimensional p-Laplacian. (2009)