@inproceedings{Hoyer:2020kX, author = "Hoyer, Paul", title = "{Bound states and Perturbation theory}", doi = "10.22323/1.374.0046", booktitle = "Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions {\textemdash} PoS(LC2019)", year = 2020, volume = "374", pages = "046" }