Document Type : Research Paper
Author
.
., .. (2002). . Economics Research, 2(4), 255–259.
., .. ".", Economics Research, 2, 4, 2002, 255–259.
., .. (2002). '.', Economics Research, 2(4), pp. 255–259.
., .., ".." Economics Research, 2 4 (2002): 255–259,
. .. . Economics Research. 2002;2(4):255–259 (In Persian).
