'A'
Title: Parameters optimization of high efficiency discrete Raman fiber amplifier by using the coupled steady-state equations
Author(s): Dou L (Dou, Liang), Liaw SK (Liaw, Shien-Kuei), Li M (Li, Ming), Lin YT (Lin, Yi-Tseng), Xu AS (Xu, Anshi)
Source: OPTICS COMMUNICATIONS 273 (1): 149-152 MAY 1 2007  
Authors' addresses:
Peking Univ, Dept Elect, Beijing 100871, Peoples R China
Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei 106, Taiwan

'B'
Title: A fast and stable method for Raman amplifier propagation equations
Author(s): Liu XM, Lee B
Source: OPTICS EXPRESS 11 (18): 2163-2176 SEP 8 2003