citHeader("To cite the PSTR package or its underlying methodology, please use the following references:")

# software
bibentry(
  bibtype = "Manual",
  title = "PSTR: Panel Smooth Transition Regression Modelling",
  author = person(given = "Yukai", family = "Yang",
                  email = "yukai.yang@statistik.uu.se",
                  role = c("aut", "cre"),
                  comment = c(ORCID = "0000-0002-2623-8549")),
  year = "2026",
  note = "R package version 2.0.0 (first released in 2017)",
  url = "https://github.com/yukai-yang/PSTR"
)

# working paper
bibentry(
  bibtype = "TechReport",
  title = "Panel Smooth Transition Regression Models",
  author = c(
    person("Andrés", "González"),
    person("Timo", "Teräsvirta"),
    person("Dick", "van Dijk"),
    person("Yukai", "Yang")
  ),
  institution = "Stockholm School of Economics",
  series = "EFI Working Paper Series in Economics and Finance",
  number = "604",
  year = "2005",
  note = "Revised October 2017",
  url = "https://swopec.hhs.se/hastef/papers/hastef0604.pdf"
)