@ARTICLE {21578, author={P. E. D. Cruz and T. M. F. Alves and A. Cartaxo}, doi={10.1109/JLT.2017.2743818}, journal={Journal of Lightwave Technology}, title={Virtual carrier-assisted DD-MB-OFDM schemes for UDWDM metro-access networks with improved tolerance to four-wave mixing}, year={2017}, month={October}, volume={35}, number={20}, pages={4468-4478}, ISSN={0733-8724} }