Gerson J. De passionibus animae ; De modo vivendi omnium fidelium. - Kln : Ulrich Zell, ca 1470. - 32 f.. URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000089012. URL: http://data.cerl.org/istc/ig00248000. URL: http://tudigit.ulb.tu-darmstadt.de/show/inc-ii-558/0001/thumbs?sid=0cfc039f7ae56254713b4f0f489d8468#current_page
