Vashyst K. M., Shvachko S. O., and Hunter Lilian. “Vashyst K. M., Shvachko S. O., Hunter Lilian. Multilevel Means of Expressing Negation in Language”. Philological Treatises, vol. 7, no. 2, Apr. 2020, pp. 70-76, https://tractatus.sumdu.edu.ua/index.php/journal/article/view/346.