Е. Г. Казимянец, “Negation as a Category of Grammar and the Ways of Its Expression (On the Basis of the Russian and Lithuanian Languages)”, KLB, vol. 38, no. 2, pp. 72–81, Dec. 1987, Accessed: Nov. 26, 2025. [Online]. Available: https://www.zurnalai.vu.lt/kalbotyra/article/view/31014