Kulikov, Anatolij, Dmitrij Kulikov, and Michael Radin. “Periodic Cycles in the Solow Model With a Delay effect”. Mathematical Modelling and Analysis 24, no. 2 (March 18, 2019): 297-310. Accessed January 6, 2025. https://mla.vgtu.lt/index.php/MMA/article/view/5382.