One safe place for hope and empowermentBert Groen, Pascale Franck, Davy Simons · First published 2017Open the Tome
Die Liturgie der OstkircheBert Groen, Christian Gastgeber, Diliana Atanassova · First published 2012Open the Tome
Toleranz und Religionsfreiheit 311-2011Anneliese Felber, Bert Groen, Michaela Sohn-Kronthaler · First published 2012Open the Tome
Four hundred years Union of Brest (1596-1996)Bert Groen, William Peter van den Bercken · First published 1998Open the Tome
