[1]
LI, W.-T. and CHENG, S.-S. 1999. AN OSCILLATiON THEOREM FOR A NEUTRAL DIFFERENCE EQUATION WITH POSITIVE AND NEGATIVE COEFFICIENTS. Tamkang Journal of Mathematics. 30, 1 (Mar. 1999), 39–46. DOI:https://doi.org/10.5556/j.tkjm.30.1999.4204.