http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trình bày các khái niệm cơ bản về cơ hệ không tự do; các nguyên lý biến phân vi phân và tích phân; khảo sát các phương trình chuyển động; phương trình chuyển động của hệ không Hôlônôm...