Coba jelasin Lihat juga dari Zhang Sixun dalam bahasa melayu dong

Sejarah sains dan teknologi di China

Liu, Heping. ""The Water Mill" and Northern Song Imperial Patronage of Art, Commerce, and Science," The Art Bulletin (Volume 84, Number 4, 2002): 566–595.

Needham, Joseph (1986). Science and Civilization in China: Volume 4, Physics and Physical Technology, Part 2, Mechanical Engineering. Taipei: Caves Books, Ltd.