http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
5 phương trình làm thay đổi thế giới
Sức mạnh và chất thơ của toán học
Michael Guillen; Phạm Văn Thiều, Trần Quốc Túy