Chung, H.S., H. Kim, S.E. Jin, E.S. Son, D.W. Kim, K.M. Lee, H.Y. Park, and Y.C. Chung. 2000. “320-Gb/S WDM Transmission With 50-GHz Channel Spacing over 564 Km of Short-Period Dispersion-Managed Fiber (perfect Cable)”. IEEE Photonics Technology Letters 12 (10): 1397-99.