[1]
Stanzhytskyi, O. et al. 2021. Averaging method and two-sided bounded solutions on the axis of systems with impulsive effects at non-fixed times. Bulletin of the Karaganda University. Mathematics Series. 104, 4 (Dec. 2021), 142–150. DOI:https://doi.org/10.31489/2021m4/142-150.