[1]
V. V. Bulitko and V. K. Bulitko, “On a criterion of $NP$-completeness”, Ukr. Mat. Zhurn., vol. 50, no. 12, pp. 1686–1691, Dec. 1998, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4788