@inproceedings{Mertens:2014jm, author = "Mertens, Tom", title = "{Generalized loop space and TMDs}", doi = "10.22323/1.205.0135", booktitle = "Proceedings of XV International Conference on Hadron Spectroscopy {\textemdash} PoS(Hadron 2013)", year = 2014, volume = "205", pages = "135" }