“A New Family of Smooth Transition Autoregressive (STAR) Models: Properties and Application of its Symmetric Version to Exchange Rates”, Commun. Phys. Sci, vol. 9, no. 3, pp. 310–324, Jul. 2023, Accessed: Jun. 09, 2026. [Online]. Available: https://journalcps.com/index.php/volumes/article/view/545