M. Summerfield, C. C. Wang, and R. S. Tucker, "Wide-band static model of semiconductor optical amplifiers with simple, accurate parameter extraction,"
in Optical Amplifiers and Their Applications, A. Mecozzi, M. Shimizu, and J. Zyskind, eds.,
Vol. 44 of OSA Trends in Optics and Photonics
(Optical Society of America, 2000), paper OMD16.