An Efficient Void Filling Algorithm for WDM Optical Packet Switches Operating under Variable-Packet-Length Self-Similar Traffic. - Chih-How Chang; Meng-Guang Tsai; Shou-Kuo Shao; Hen-Wai Tsao; Malla Reddy Perati; Jingshown Wu (IEICE Trans. Commun., 2005)