Horner, Charles; Jung-pang, Lo; and Elleman, Bruce
"China as a Sea Power: A Preliminary Survey of the Maritime Expansion and Naval Exploits of the Chinese People during the Southern Song and Yuan Periods,"
Naval War College Review: Vol. 66
, Article 12.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol66/iss2/12