Girdzijauskas, Stasys, and Vera Moskaliova. “INSTABILITY MODELING OF FINANCIAL PYRAMIDS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 18, 2005): 26–32. Accessed May 4, 2024. https://journals.ru.lv/index.php/ETR/article/view/2126.