@InProceedings{buelow2014experimental,
	author = {Bülow, Henning and Lu, Xiaofeng and Schmalen, Laurent and Klekamp, Axel and Buchali, Fred},
	title = {Experimental performance of 4D optimized constellation alternatives for PM-8QAM and PM-16QAM},
	booktitle = {Proc. Opt. Fiber Commun. Conf. (OFC)},
	pages = {M2A–6},
	address = {San Francisco, CA, USA},
	month = Mar,
	year = {2014},
}