Sungkuen Lee Eallae Kim Yongwon Lee Sangrok Lee Daekwang Jung Seongtaek Hwang Yunje Oh Jinwoo Park A Design of WDM/TDM-PON Provisioning for Future Optical Access Network Upgrade. 2456-2463 2007 90-B IEICE Transactions 9 http://dx.doi.org/10.1093/ietcom/e90-b.9.2456 db/journals/ieicet/ieicet90b.html#LeeKLLJHOP07