http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Tiêu chuẩn Việt Nam : Chè, phương pháp xác định chất xơ. TCVN 5714-1993
Xác định độ ẩm theo TCVN 5613-1991