@inproceedings{vanVliet:20193J, author = "van Vliet, Arjen and Alves Batista, Rafael and Hörandel, Jörg R.", title = "{Current constraints from cosmogenic neutrinos on the fraction of protons in UHECRs}", doi = "10.22323/1.358.1025", booktitle = "Proceedings of 36th International Cosmic Ray Conference {\textemdash} PoS(ICRC2019)", year = 2019, volume = "358", pages = "1025" }