Document Type : Research Paper
Author
.
., .. (2001). . Economics Research, 1(3), 207–216.
., .. ".", Economics Research, 1, 3, 2001, 207–216.
., .. (2001). '.', Economics Research, 1(3), pp. 207–216.
., .., ".." Economics Research, 1 3 (2001): 207–216,
. .. . Economics Research. 2001;1(3):207–216 (In Persian).
