Molencki, Rafał. “The Grammaticalization of the Epistemic Adverb Perhaps in Late Middle and Early Modern English”. Studia Anglica Posnaniensia 56, no. s1 (December 1, 2021): 411–424. Accessed December 22, 2024. https://pressto.amu.edu.pl/index.php/stap/article/view/stap-2021-0005.