Swetz, Frank J. (February 1995). "The volume of a sphere: A Chinese derivation". The Mathematics Teacher. 88 (2): 142–145. doi:10.5951/MT.88.2.0142. JSTOR27969235.
Swetz, Frank J. (February 1995). "The volume of a sphere: A Chinese derivation". The Mathematics Teacher. 88 (2): 142–145. doi:10.5951/MT.88.2.0142. JSTOR27969235.