Iris Foxfoot [aut],
  Todd Swannack [cre],
  U.S. Army Engineer Research and Development Center [cph, fnd]

Andrew Gard [aut, cre] (ORCID: <https://orcid.org/0000-0003-4434-0755>),
  Alexia Myers [aut],
  Irene Luwabelwa [aut]

Cole Brokamp [aut, cre, cph] (ORCID:
    <https://orcid.org/0000-0002-0289-3151>),
  Tomasz Kalinowski [ctb]

Muhammed Irshad M [aut, cre],
  Dr. Kader Ali Sarkar [aut],
  Dr. Digvijay Singh Dhakre [aut],
  Prof. Debasis Bhattacharaya [aut]

Martin Maechler [aut, cre] (ORCID:
    <https://orcid.org/0000-0002-8685-9910>),
  Chris Fraley [ctb, cph] (S original; Fortran code),
  Friedrich Leisch [ctb] (R port, ORCID:
    <https://orcid.org/0000-0001-7278-1983>),
  Valderio Reisen [ctb] (fdGPH() & fdSperio()),
  Artur Lemonte [ctb] (fdGPH() & fdSperio()),
  Rob Hyndman [ctb] (residuals() & fitted(), ORCID:
    <https://orcid.org/0000-0002-2140-5352>)

Lealand Morin [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-8539-1386>)

Neringa Urbonaite [aut, cre],
  Leonidas Sakalauskas [aut]

Hana Sevcikova <hanas@uw.edu>, 
	Don Percival <dbp@apl.washington.edu>,
        Tilmann Gneiting <tilmann@stat.washington.edu>

Sergio Costa [aut, cre, cph] (ORCID:
    <https://orcid.org/0000-0001-5432-317X>),
  Gilmara Machado [aut, cph] (ORCID:
    <https://orcid.org/0000-0003-1455-9086>)

Philipp Hermann, Jozef Kiselak, Milan Stehlik

Francesco Paolo Mancuso [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-7217-5131>)

Lifeng Lin [aut, cre] (ORCID: <https://orcid.org/0000-0002-3562-9816>),
  Haitao Chu [aut] (ORCID: <https://orcid.org/0000-0003-0932-598X>)

Giovanny Covarrubias-Pazaran, Luis Diaz-Garcia, Brandon Schlautman, Walter Salazar, Juan Zalapa.

Il Do Ha, Maengseok Noh, Jiwoong Kim, Youngjo Lee

Xifen Huang [aut],
  Yunpeng Zhou [aut, cre],
  Jinfeng Xu [ctb]

Virginie Rondeau [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-7109-4831>),
  Juan R. Gonzalez [aut],
  Yassin Mazroui [aut],
  Audrey Mauguen [aut],
  Amadou Diakite [aut],
  Alexandre Laurent [aut],
  Myriam Lopez [aut],
  Agnieszka Krol [aut],
  Casimir L. Sofeu [aut],
  Julien Dumerc [aut],
  Denis Rustand [aut],
  Jocelyn Chauvet [aut],
  Quentin Le Coent [aut],
  Romain Pierlot [aut],
  Lacey Etzkorn [aut],
  Derek Dinart [aut],
  Adrien Orué [aut],
  David Hill [cph],
  John Burkardt [cph],
  Alan Genz [cph],
  Ashwith J. Rego [cph]