Document Type : Research Paper
Author
.
.,. . (2003). .. Economics Research, 3(8), 99-116.
.,. . ".", Economics Research, 3, 8, 2003, 99-116.
. .. (2003). '.', Economics Research, 3(8), pp. 99-116.
. ., ".," Economics Research, 3 8 (2003): 99-116,
. .. .. Economics Research. 2003;3(8):99-116 (In Persian).
