FATEMI GHOMI, S., JOLAI, F., MOHAMMADI, M. (2003). 'A TWO-ECHELON REPAIRABLE INVENTORY SYSTEM WITH TWO KINDS OF DEFECTIVES, ONE KIND REPAIRED AT THE CENTERAL DEPOT AND THE OTHER ONE REPAIRED AT STOCKING CENTERS', Amirkabir Journal of Science and Research, 29(2), pp. 608-617.