Pre One: 30. Bing Liu, Periodic solutions of a nonlinear second-order differential equations with deviating argument, J. Math. Anal. Appl. , 309(2005),313-323.
Next One: 28. Bing Liu, Controllability of neutral functional differential and integrodifferential inclusions with infinite delay, J. Optimiz.Theory Appl., 123:3(2004), 573-593.