@InProceedings{buchali2017spectrally, author = {Buchali, Fred and Idler, Wilfried and Dischler, Roman and Eriksson, Tobias and Schmalen, Laurent}, title = {Spectrally efficient probabilistically shaped square 64QAM to 256 QAM}, book_title = {Proc. Eur. Conf. Opt. Commun. (ECOC)}, pages = {1–3}, address = {Gothenburg, Sweden}, month = Sep, year = {2017}, }