“…Recently there has been a great interest in studying the oscillatory and asymptotic behavior of third order differential equations, see for example [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23], and the references cited therein. In [1,4,7,8,9,15,20,23], the authors studied the oscillatory behavior of solutions of equation (1.1) when b(t) ≡ 0, c(t) ≡ 0 and p(t) ≡ 0.…”