Rafa? Witkowski  <br />Dom George Schwengel and his historiographical works,  in: Robert Bindel & Pierre-Aelred Henel (eds.), Dom Innocent Le Masson, chartreux méconnu, Noyonnais oublié, Salzburg, 2007, 219-256 (= Analecta Cartusiana, 209)<br />[Witkowski 2007]