@inproceedings{Braun:1999Qr, author = "Braun, V", title = "{Sum Rules}", doi = "10.22323/1.003.0006", booktitle = "Proceedings of 8th International Symposium on Heavy Flavour Physics {\textemdash} PoS(hf8)", year = 1999, volume = "003", pages = "006" }