Maciej Romaniuk [cre, aut] (<https://orcid.org/0000-0001-9649-396X>),
  Przemyslaw Grzegorzewski [aut]
    (<https://orcid.org/0000-0002-5191-4123>),
  Abbas Parchami [aut] (<https://orcid.org/0000-0002-0593-7324>),
  Luis Carvalho [ctb, cph] (Procedures from kolmim package in the
    kolmim.c file)

Asun Lubiano <lubiano@uniovi.es>, Sara de la Rosa de Saa 
         <rosasara@uniovi.es>

Andrea García Cernuda [aut, cre],
  Asun Lubiano [aut] (<https://orcid.org/0000-0002-9847-5164>),
  Sara de la Rosa de Sáa [ctb]

Redina Berkachy <redina.berkachy@unifr.ch>,  Laurent Donze <laurent.donze@unifr.ch>

Lampros Mouselimis [aut, cre] (<https://orcid.org/0000-0002-8024-1546>),
  SeatGeek Inc [cph]

Marta Sestelo [aut, cre],
  Nora M. Villanueva [aut],
  Javier Roca-Pardinas [aut]

Alexander Fischer [aut, cre],
  David Roodman [aut],
  Achim Zeileis [ctb] (Author of included sandwich fragments),
  Nathaniel Graham [ctb] (Contributor to included sandwich fragments),
  Susanne Koell [ctb] (Contributor to included sandwich fragments),
  Laurent Berge [ctb] (Author of included fixest fragments),
  Sebastian Krantz [ctb]

Tanuj Misra [aut, cre],
  Alka Arora [aut],
  Sudeep Marwaha [aut],
  Shailendra Kumar [aut],
  Mrinmoy Ray [aut],
  Sudhir Kumar [aut],
  Sayanti Guha Majumder [aut]

Shawn Gilroy [aut, cre, cph] (<https://orcid.org/0000-0002-1097-8366>)

Achim Zeileis [aut, cre] (<https://orcid.org/0000-0003-0918-3766>),
  Ajay Shah [ctb],
  Ila Patnaik [ctb],
  Anmol Sethy [ctb]

Mengmeng Liu [aut] (<https://orcid.org/0000-0001-6250-0148>),
  Iain Colin Prentice [aut] (<https://orcid.org/0000-0002-1296-6764>),
  Cajo J. F. ter Braak [aut] (<https://orcid.org/0000-0002-0414-8745>),
  Sandy P. Harrison [aut] (<https://orcid.org/0000-0001-5687-1903>),
  Roberto Villegas-Diaz [aut, cre]
    (<https://orcid.org/0000-0001-5036-8661>),
  SPECIAL Research Group @ University of Reading [cph]

Takeshi Emura [aut, cre],
  Szu-Peng Yang [ctb]

Regis K. Gallon (MNHN), Jerome Fournier (CNRS|MNHN)

Farimah Houshmand Nanehkaran, Seyed Mohammad Reza Lajevardi <R.Lajevardi@iaukashan.ac.ir>, Mahmoud Mahlouji Bidgholi <m.mahlouji@iaukashan.ac.ir>