Grotowski, Piotr Ł. “Fotinus, Żywot Jana Postnika (Vita Ioannis Ieiunatoris Episcopi Constantinopoleos, BHG II 893, CPG 7971)”. Vox Patrum 59 (January 25, 2013): 607–646. Accessed March 29, 2024. https://czasopisma.kul.pl/index.php/vp/article/view/4061.