On the roots of Unitarianism, see ANTAL PIRNAT, Die Ideologie der siebenbürger Antitrinitarier in der 1570-er Jahren (Budapest, 1961), and Róbert DÁN, Mathias Vehe- Glirius and Radical Reformation (Budapest, 1982). On the printer-publisher at Kolozsvár and Gáspár Heltai, see József WALDAPFEL, 'La prose de Gáspár Heltai et la littérature mondiale', in Waldapfel, A travers siècles et frontières (Budapest, 1968).