ELORREAGA, Heli, GOMEZ, Adrian, MORALES, Nolbert and ZAMORA, Manuel. Periodic solutions to non-autonomous predator-prey systems with multiple and time-dependent delays. Topological Methods in Nonlinear Analysis. Online. 1 October 2025. Vol. 66, no. 1, pp. 151 - 167. [Accessed 12 December 2025]. DOI 10.12775/TMNA.2025.012.