Adoga, I., & Valverde, R. (2014). AN RFID Based Supply Chain Inventory Management Solution for the Petroleum Development Industry: A Case Study for Shell Nigeria. Journal of Theoretical and Applied Information Technology, 62(1), 199-203.

Babbie E.  (2001), The Practice of Social Research. 9th edition. Belmont, CA: Wadsworth/Thompson.

Bartlett II J. E., Kotrlik J. W. and Higgins C. C. (2001).  Organizational research: Determining appropriate sample size in survey research. Information Technology, Learning, and Performance Journal, vol.19, no. 1, pp. 43-50. 
 
        
Feldman L. P, NPD impact of outsourcing (2001): Are we losing touch with the new product function?, Visions Magazine Laurence P. Feldman & Associates, vol. 26, no. 1, pp.17-21.  

Hua H. and Cong. P. (2011), Analysis of E-SCM, in Communication Systems and Information Technology (M. Ma, Ed.).  Berlin Heidelber: Springer-Verlag, pp. 867-874. 

Khan, N., & Valverde, R. (2014). The use of RFID based supply chain systems in data centers for the improvement of the performance of financial institutions. Engineering Management Research, 3(1), p24.

ILO 2000. (2011, November) Electronic commerce: Some implications for firms and workers in  developing countries. International Labour Organization. [Online]. Available:  http://www.ilo.org/public/english/bureau/inst/ publications/discussion/dp12300.pdf   

Lyell M.. (2000), Changing EMS Business Models for the New Millennium. California: State University.

Perry, C. (1998), Processes of a case study methodology for postgraduate research in marketing, European Journal of Marketing, vol.32, no. 9, pp. 785-802.


Simchi-Levi D., Kaminsky P. and Simchi-Levi E.. (2003), Designing and Managing the Supply Chain: Concepts, Strategies and Case Studies. New York : McGraw-Hill.

Småros J., Lehtonen J., Appelqvist P. and Holmström J.. (2003), The impact of increasing demand visibility on production and inventory control efficiency. International Journal of Physical Distribution & Logistics Management, vol. 33, no. 4, pp. 336-354.

Sommer B.  and Sommer R. (1997), A Practical Guide to Behavioral Research: Tools and Techniques (4th ed.). New York: Oxford U Press.

Stephens J., Valverde R. (2013), Security of E-Procurement Transactions in Supply Chain Re-Engineering.  Computer and Information Science; Vol. 6, No. 3.

 
Valverde, R and Talla M. (2012). Information Systems Reengineering for Modern Business Systems: ERP, Supply Chain and E-Commerce Management Solutions: ERP, Supply Chain and E-Commerce Management Solutions. IGI Global.


Yin R.K.. (1994), Case Study Research-Design and Methods, Applied Social Research Methods Series, vol. 5, 2nd edn., Newbury Park:  Sage.

Zikmund W.G. (2000), Business Research Methods, 6th edition. Forth Worth: The Dryden Press.