Roberson, Ronald G..
The Eastern Christian churches: a brief survey /
Ronald G. Roberson 
. - (Revised 3rd edition) 
. - Roma  : Pont. Institutum Studiorum Orientalium,  1990 
. - XI, 129 p.  21 cm. 
<br/>К.: Бібліогр. : c. 119-125, Index