Chukwuemerie, U. J., H. O. Ossamulu, and I. H. Chibueze. “Strategizing Economy Using Spiral Spring Process Model (SSPM)”. The International Journal of Science & Technoledge, vol. 3, no. 6, June 2015, http://internationaljournalcorner.com/index.php/theijst/article/view/124434.