WASET
Mguni, L. , Meijboom, R. , Jalama, K.. "Effect of Calcination Temperature and MgO Crystallite Size on MgO/TiO2 Catalyst System for Soybean Transesterification". World Academy of Science, Engineering and Technology, Open Science Index 64, International Journal of Materials and Metallurgical Engineering, (2012), 6(4), 375 - 379.