@inproceedings{Kłusek-Gawenda:2014Zx, author = "Kłusek-Gawenda, Mariola", title = "{Exclusive production of two and four pions in ultraperipheral, ultrarelativistic collisions}", doi = "10.22323/1.180.0020", booktitle = "Proceedings of The European Physical Society Conference on High Energy Physics {\textemdash} PoS(EPS-HEP 2013)", year = 2014, volume = "180", pages = "020" }