Oscillation criteria for the first-order linear difference equations with several delay arguments. (English) Zbl 1342.39013
J. Math. Sci., New York 208, No. 5, 571-592 (2015) and Neliniĭni Kolyvannya 17, No. 2, 248-267 (2014).
Reviewer: Roman Šimon Hilscher (Brno)