(2006). . Nivar, 31(60-61), 43-52.
. "", Nivar, 31, 60-61, 2006, 43-52.
(2006). '', Nivar, 31(60-61), pp. 43-52.
, "," Nivar, 31 60-61 (2006): 43-52,
. Nivar, 2006; 31(60-61): 43-52.
