Otto Gründler  <br />Devotio moderna atque antiqua. The Modern Devotion and Carthusian spirituality,  in: Rozanne Elder (ed.), The spirituality of Western Christendom,  dl. 2: The roots of the modern Christian tradition, Kalamazoo (Mich.), 1984, 27-45, 300-303 (= Cistercian studies series, 55)<br />[Gründler 1984]