Czyżak, Marta. 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 (December):95-106. https://doi.org/10.12775/FT.2015.006.