T. R. Mihić Pijetlović, “Modal Expressions, Adjectives, Adverbs and Nouns as Means for Expressing Root Modality in English and Their Translation Equivalents in Serbian”, Zb rad Filoz fak Priština, vol. 50, no. 2, pp. 33–58, Aug. 2020, doi: 10.5937/zrffp50-22289.