Meyer (1893a: 324): 'Bl. 7 b, 54 b, 84 b, 133 b blattgrosse Bilder der Evangelisten'.
Nelson (1991: 80): 'The scribe claims to have completed a copy of the four Gospels with the Acts and Epistles, but Göttingen 28 contains only the Gospels. Perhaps he also wrote a now missing companion volume with the Praxapostolos'.