@book{Weiss, author = {Weiss, J.}, title = {Earliest Christianity. A History of the Period A.D. 30-150, Vol. I, New York (Harper \& Brothers, Publishers) 1959.}, language = {en} } @book{Weiss, author = {Weiss, J.}, title = {How Psychotherapy Works. Process and Technique. New York (Guilford) 1993.}, language = {en} }