Georg Böcherer Francesca Diedolo Fabio Pittalà Label Extension for 32QAM: The Extra Bit for a Better FEC Performance-Complexity Tradeoff. 1-4 2020 ECOC https://doi.org/10.1109/ECOC48923.2020.9333403 conf/ecoc/2020 db/conf/ecoc/ecoc2020.html#BochererDP20