Disfocality and Liapunov-type inequalities for third-order equations. - N. Parhi; Saroj Panigrahi (Appl. Math. Lett., 2003)

On oscillatory and asymptotic behavior of fourth order non-linear neutral delay dynamic equations. - Saroj Panigrahi; P. Rami Reddy (Comput. Math. Appl., 2011)