Tài liệu tham khảo WikiPedia: Kito_Aya http://www.youtube.com/watch?v=Sxmz57qeglE http://htv3.tv/program/395-1-lit-nuoc-mat.html http://www.eva.vn/suc-khoe/nhung-can-benh-y-hoc-va... http://phapluattp.vn/2012090312333950p0c1021/nghi-...