@inproceedings{Bamba:2016vQ, author = "Bamba, Kazuharu", title = "{Inflationary universe in a conformally-invariant two scalar-field theory with an $R^2$ term}", doi = "10.22323/1.268.0006", booktitle = "Proceedings of 11th International Workshop Dark Side of the Universe 2015 {\textemdash} PoS(DSU2015)", year = 2016, volume = "268", pages = "006" }