«Archived copy». Archivado desde el original el 13 de septiembre de 2012. Consultado el 6 de junio de 2015.
books.google.com
Daniel Coit Gilman; Harry Thurston Peck; Frank Moore Colby, eds. (1906). «Sword». The New International Encyclopaedia. Dodd, Mead and company. p. 765. Consultado el 19 de diciembre de 2007. «...one edged sword in general called a katana.»
«The Japanese Sword. Katana wa Bushi no tamashii (The Sword Is the Soul of the Samurai)». Museum of Fine Arts Bulletin4 (21): 29-31. August 1906. JSTOR4423299.
The way to Kwan Yi is distant and not accessible anymore, the legend of its sword being able to cut jade is unbeatable. A treasured sword from the near country Japan (could be obtained easier), all you need to do is cross the sea to the east. The sheath is decorated by fish skin, the yellow and white parts are mixed by chalcopyrite and copper. A good help that could be bought by hundred gold, equipping it can dispel evil. Original script: 昆夷道遠不復通，世傳切玉誰能窮。寶刀近出日本國，越賈得之滄海東。魚皮裝貼香木鞘，黃白閒雜鍮與銅。百金傳入好事手，佩服可以禳妖凶。 see Chinese wikisource for full script.
