Yikai Wang [Emory University], Xiao Wang [ICF]

original from National Institutes for Standards and Technology
        (NIST) http://www.itl.nist.gov/div898/strd/nls/nls_main.shtml R
        port by Douglas Bates <bates@stat.wisc.edu>

Troy D. Hill, Nathalie R. Sommer, Caroline R. Kanaskie, Emily A. Santos, and Autumn J. Oczkowski

Harald Schellander [aut, cre],
  Michael Winkler [ctb]

Mariana Menchero [aut, cre] (First author and maintainer),
  Nixtla [cph] (Copyright held by 'Nixtla')

Xianyan Chen <xychen@uga.edu>, Xiangrong Yin <yinxiangrong@uky.edu>

Michail Tsagris [aut, cre],
  Nikolaos Pandis [aut]

Maude Wagner [aut, cre] (<https://orcid.org/0000-0002-1834-3218>),
  Ana W. Capuano [aut],
  Emmanuelle Comets [ctb]

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]

Andrzej Galecki agalecki@umich.edu, Tomasz Burzykowski tomasz.burzykowski@uhasselt.be

Eun-Kyung Lee [aut, cre],
  Eun-Hwa Kang [aut]

Matthew Fidler [aut, cre] (<https://orcid.org/0000-0001-8538-6691>),
  Yuan Xiong [ctb],
  Rik Schoemaker [ctb] (<https://orcid.org/0000-0002-7538-3005>),
  Justin Wilkins [ctb] (<https://orcid.org/0000-0002-7099-9396>),
  Wenping Wang [ctb],
  Mirjam Trame [ctb],
  Huijuan Xu [ctb],
  John Harrold [ctb],
  Bill Denney [ctb] (<https://orcid.org/0000-0002-5759-428X>),
  Theodoros Papathanasiou [ctb],
  Teun Post [ctb],
  Richard Hooijmaijers [ctb]

Matthew Fidler [aut, cre] (<https://orcid.org/0000-0001-8538-6691>),
  Rik Schoemaker [ctb] (<https://orcid.org/0000-0002-7538-3005>),
  Kyle Baron [ctb],
  Thierry Wendling [ctb],
  Ted Grasella [ctb],
  C Weil [ctb],
  Yaning Wang [ctb],
  R O'Reilly [ctb],
  David D'Argenio [ctb],
  Rodriguez-Vera [ctb],
  D Gaver [ctb],
  Yuan Xiong [ctb],
  Wenping Wang [aut]