@inproceedings{Buffing:20131A, author = "Buffing, Maarten and Mukherjee, A. and Mulders, Piet", title = "{Universality of TMD distribution functions}", doi = "10.22323/1.191.0226", booktitle = "Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects {\textemdash} PoS(DIS 2013)", year = 2013, volume = "191", pages = "226" }