c(person("José", "Pinheiro", role = "aut", comment = "S version"),
person("Douglas", "Bates", role = "aut", comment = "up to 2007"),
person("Saikat", "DebRoy", role = "ctb", comment = "up to 2002"),
person("Deepayan", "Sarkar", role = "ctb", comment = "up to 2005"),
person("EISPACK authors", role = "ctb", comment = "src/rs.f"),
person("Siem", "Heisterkamp", role = "ctb", comment = "Author fixed sigma"),
person("Bert", "Van Willigen",role = "ctb", comment = "Programmer fixed sigma"),
person("Johannes", "Ranke", role = "ctb", comment = "varConstProp()"),
person("R-core", email = "R-core@R-project.org",
role = c("aut", "cre")))
José Pinheiro [aut] (S version),
Douglas Bates [aut] (up to 2007),
Saikat DebRoy [ctb] (up to 2002),
Deepayan Sarkar [ctb] (up to 2005),
EISPACK authors [ctb] (src/rs.f),
Siem Heisterkamp [ctb] (Author fixed sigma),
Bert Van Willigen [ctb] (Programmer fixed sigma),
Johannes Ranke [ctb] (varConstProp()),
R-core [aut, cre]

c(person("José", "Pinheiro", role = "aut", comment = "S version"),
person("Douglas", "Bates", role = "aut", comment = "up to 2007"),
person("Saikat", "DebRoy", role = "ctb", comment = "up to 2002"),
person("Deepayan", "Sarkar", role = "ctb", comment = "up to 2005"),
person("EISPACK authors", role = "ctb", comment = "src/rs.f"),
person("Siem", "Heisterkamp", role = "ctb", comment = "Author fixed sigma"),
person("Bert", "Van Willigen",role = "ctb", comment = "Programmer fixed sigma"),
person("Johannes", "Ranke", role = "ctb", comment = "varConstProp()"),
person("R Core Team", email = "R-core@R-project.org",
role = c("aut", "cre")))
José Pinheiro [aut] (S version),
Douglas Bates [aut] (up to 2007),
Saikat DebRoy [ctb] (up to 2002),
Deepayan Sarkar [ctb] (up to 2005),
EISPACK authors [ctb] (src/rs.f),
Siem Heisterkamp [ctb] (Author fixed sigma),
Bert Van Willigen [ctb] (Programmer fixed sigma),
Johannes Ranke [ctb] (varConstProp()),
R Core Team [aut, cre]

Jose Pinheiro <jcp@research.bell-labs.com>,
Douglas Bates <bates@stat.wisc.edu>,
Saikat DebRoy <saikat@stat.wisc.edu>, and
Deepayan Sarkar <deepayan@stat.wisc.edu>