Z.  Wu, Choi, T. Y., and Rungtusanatham, M., ?Supplier-Supplier Relationships in Buyer-Supplier-Supplier Triads: Implications for Supplier Performance?, Journal of Operations Management, vol. 28, no. 2, pp. 115-123, 2010.

M.  Rungtusanatham, Choi, T. Y., Hollingsworth, D. G., Wu, Z., and Cipriano, F., ?Survey Research in Production/Operations Management: Historical Analyses and Opportunities for Improvement?, Journal of Operations Management, vol. 21, no. 4, pp. 475-488, 2003.