Hyo-Sik Yang Martin Herzog Martin Maier Martin Reisslein Metro WDM networks: performance comparison of slotted ring and AWG star networks. 1460-1473 2004 22 IEEE Journal on Selected Areas in Communications 8 http://doi.ieeecomputersociety.org/10.1109/JSAC.2004.830448 db/journals/jsac/jsac22.html#YangHMR04