t0, where p (t) is nonnegative function on R and τ (t) is non-monotone or nondecreasing
function such that τ (t)≥ t for t≥ t0. Under these assumptions we researched oscillatory
behaviour of solutions of nonlinear advanced differential equations and we obtain new
oscillation criteria, involving limsup and liminf. An example illustruting the result is also
given.