http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Hệ thống điều khiển bằng thuỷ lực (lý thuyết và các ứng dụng thực tế)
Nguyễn Ngọc Phương, Huỳnh Nguyễn Hoàng
Kỹ nghề thủy lực--Động lực học