Elorreaga, Heli, Adrian Gomez, Nolbert Morales, and Manuel Zamora. “Periodic Solutions to Non-Autonomous Predator-Prey Systems With Multiple and Time-Dependent Delays”. Topological Methods in Nonlinear Analysis 66, no. 1 (October 1, 2025): 151–167. Accessed December 12, 2025. https://apcz.umk.pl/TMNA/article/view/65910.