OSCILLATION CRITERIA FOR EVEN ORDER NEUTRAL DIFFERENCE EQUATIONS Статья Selvarangam S., Rupadevi S.A., Thandapani E., Pinelas S. Opuscula Mathematica. AGH University of Science and Technology. Том 39. 2018. С. 91-108
OSCILLATION OF SOLUTIONS TO NON-LINEAR DIFFERENCE EQUATIONS WITH SEVERAL ADVANCED ARGUMENTS Статья Pinelas S., Dix J.G. Opuscula Mathematica. AGH University of Science and Technology. Том 37. 2017. С. 887-898