E. Thandapani, OSCILLATION THEOREMS FOR HIGHER-ORDER NONLINEAR DIFFERENCE-EQUATIONS, Indian Journal of Pure and Applied Mathematics, 25(5), 1994, pp. 519-524
New oscillation theorems for the difference equation DELTA(m) y(n) + q
(n) f(y(n))g(DELTA(m-1) y(n)) = 0, m even n is-an-element-of N(n0) are
established.