@article{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",
  journal = "PoS",
  year = 2016,
  volume = "DSU2015",
  pages = "006"
}