Juthaporn Keorath และ Nipan Israsena. (2007) Limbal stem cells maintenance in the in vitro cultivation. Chulalongkorn University:ม.ป.ท.Juthaporn Keorath และ Nipan Israsena. 2007. Limbal stem cells maintenance in the in vitro cultivation. ม.ป.ท.:Chulalongkorn University;Juthaporn Keorath และ Nipan Israsena. Limbal stem cells maintenance in the in vitro cultivation. ม.ป.ท.:Chulalongkorn University, 2007. Print.