@inproceedings{Krein:2019fN, author = "Krein, Gastao", title = "{The Born-Oppenheimer approximation in an effective field theory framework}", doi = "10.22323/1.336.0110", booktitle = "Proceedings of XIII Quark Confinement and the Hadron Spectrum {\textemdash} PoS(Confinement2018)", year = 2019, volume = "336", pages = "110" }