http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Chuyên đề ứng dụng vectơ trong giải toán hình học không gian
Võ Thanh Văn (Chủ biên); Lê Hiển Dương; Nguyễn Ngọc Giang