Chanchay, N. , Sirisansaneeyakul, S. , Chaiyasut, C. , Poosaran, N.. "Optimal Conditions for Carotenoid Production and Antioxidation Characteristics by Rhodotorula rubra". World Academy of Science, Engineering and Technology, Open Science Index 68, International Journal of Biotechnology and Bioengineering, (2012), 6(8), 621 - 625.