@inproceedings{Falcioni:20228p, author = "Falcioni, Giulio", title = "{Renormalisation of singlet operators to four loops}", doi = "10.22323/1.416.0049", booktitle = "Proceedings of Loops and Legs in Quantum Field Theory {\textemdash} PoS(LL2022)", year = 2022, volume = "416", pages = "049" }