Cantica Domini in Terra Aliena / Christian songs under persecution and oppression (2 volumes). International Conference of Hymnology IAH, HSUSC and HSGBIin cooperation with the University Opole, 26th July - 31st July 2009 in Opole-Kamien Sl. (Poland) (I.A.H. Bulletin. Nr 38/2010 + 39/2011)