Some results on nonlinear difference-differential equations. (English) Zbl 1526.30047
J. Contemp. Math. Anal., Armen. Acad. Sci. 58, No. 4, 289-301 (2023) and Izv. Nats. Akad. Nauk Armen., Mat. 58, No. 4, 89-104 (2023).