Praiya Thana และ Artiwan Shotipruk. (2006) Optimization of supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis. Chulalongkorn University:ม.ป.ท.Praiya Thana และ Artiwan Shotipruk. 2006. Optimization of supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis. ม.ป.ท.:Chulalongkorn University;Praiya Thana และ Artiwan Shotipruk. Optimization of supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis. ม.ป.ท.:Chulalongkorn University, 2006. Print.