@article{DeFreitas:2024sC, author = "De Freitas, Abilio and Blümlein, Johannes and Marquard, Peter and Schneider, Carsten", title = "{Challenges for analytic calculations of the massive three-loop form factors}", doi = "10.22323/1.467.0031", journal = "PoS", year = 2024, volume = "LL2024", pages = "031" }