@book{Kueng, author = {Kueng, H.}, title = {The Council, Reform and Reunion, New York (Sheed and Ward) 1961.}, language = {en} } @book{Kueng, author = {Kueng, H.}, title = {Christ sein, 8th edition, M{\"u}nchen (Piper Verlag) 1976.}, language = {de} }