T. N. TRAN, Q.-V. TRAN, H. T. HUYNH, N.-S. HOANG, H. C. NGUYEN, and D.-N. NGO, “Astaxanthin Production by Newly Isolated Rhodosporidium toruloides: Optimization of Medium Compositions by Response Surface Methodology”, Not Bot Horti Agrobo, vol. 47, no. 2, pp. 320–327, Dec. 2018.