Invoking the Patristic Authority in Controversies. The 318 Fathers of Nicaea and the 150 Fathers of Constantinople in Late Antique East Syriac Texts - Popa, Cătălin-Ştefan ca. 20./21. Jh. (Papers presented at the Eighteenth International Conference on Patristic Studies held in Oxford 2019 ; volume 22: Liturgica, tractatus symboli, Orientalia, Critica et philologica, 2021)