1. (1) e.c., Iwashimizu S., Fluctuation of Sprocket HEEL Teeth Load in Chain Transmission, Bulletin of Laboratory in Ritsumeikan University, 61; 2002; 167 (written in Japanese).
2. (2) JIS B 1801; 1997, Short-Pitch Transmission Precision Roller Chains and Bush Chains (written in Japanese).
3. (3) Standard of Japan Chain Association, Chains for Motor Bike, 1; 1981 (written in Japanese).
4. (4) Nakagome M., Story of Chain, Japanese Standards Association,, 1997; 101 (written in Japanese).
5. (5) Homepage of Enuma Chain Mfg. Co., Ltd.; http://www.enuma.co.jp/ (accessed on Dec. 10, 2008)