Pliuškevičius , Regimantas. “Loop-Free Verification of Termination of Derivation for a Fragment of Dynamic Logic”.
Lietuvos matematikos rinkinys 48, no. proc. LMS (December 21, 2008): 283–287. Accessed April 14, 2025.
https://www.journals.vu.lt/LMR/article/view/18111.