@inproceedings{Kondo:2013UE, author = "Kondo, Kei-Ichi", title = "{Physical unitarity of a massive Yang-Mills theory without the Higgs field from a viewpoint of confinement}", doi = "10.22323/1.171.0056", booktitle = "Proceedings of Xth Quark Confinement and the Hadron Spectrum {\textemdash} PoS(Confinement X)", year = 2013, volume = "171", pages = "056" }