Vasilecas, Olegas, and Evaldas Lebedys. “The Use of Formal Languages for Business Rules Realisation in Information Systems”. Lietuvos matematikos rinkinys 45, no. spec. (December 18, 2005): 174–179. Accessed November 7, 2025. https://www.zurnalai.vu.lt/LMR/article/view/26586.