http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Giáo trình nghiên cứu chung về kim loại và các nguyên tố phân nhóm IA, IIA, và III, các nguyên tố phân nhóm phụ
Nguyễn Thị Thu Thủy, Ngô Quốc Luân (Biên soạn)