Foruhi, T., M. Behzad, Z. Akhoundpour Amiri, M. Felekari, and H. Havangi. “Employing Lean Concepts and Tools in Innovative and R&D Based Organizations”. International Journal of Applied Optimization Studies, vol. 1, no. 01, Sept. 2018, pp. 71-85, http://ijaos.com/index.php/home/article/view/27.