Mikulskas, Rolandas. “Descriptive Problems in Defining the Category of Copulas: Syntactic and Semantic Distribution of the Ingressive Copulas VIRSTI and TAPTI”. Lietuvių kalba 12, no. 12 (December 15, 2018): 1–63. Accessed November 17, 2025. https://www.zurnalai.vu.lt/lietuviu-kalba/article/view/22519.