@inproceedings{Ejiri:2015iO, author = "Ejiri, Shinji", title = "{First order transition regions in the quark masses and chemical potential parameter space of QCD}", doi = "10.22323/1.217.0014", booktitle = "Proceedings of 9th International Workshop on Critical Point and Onset of Deconfinement {\textemdash} PoS(CPOD2014)", year = 2015, volume = "217", pages = "014" }