Czyżak, M. 2015. The digitalisation of the most valuable medieval manuscripts of the University Library in Toruń. “Sermones super Psalterium” by Johannes de Abbatisvilla from the second half of the 13th century (Rps 9/I): problems connected with the identification of the. Folia Toruniensia. 15, (Dec. 2015), 95–106. DOI:https://doi.org/10.12775/FT.2015.006.