WASET
Ihueze, C. , Obiuto, C. , Okafor, C. , Okpala, C.. "Orthogonal Array Application and Response Surface Method Approach for Optimal Product Values: An Application for Oil Blending Process". World Academy of Science, Engineering and Technology, Open Science Index 76, International Journal of Physical and Mathematical Sciences, (2013), 7(4), 610 - 614.