http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Phương pháp vectơ trong giải toán hình học phẳng
Sách dùng cho học sinh khá, giỏi, học sinh chuyên toán, kiến thức và phương pháp các bài toán mẫu luyện tập đáp số và hướng dẫn giải