To cite package synoptReg in publications use:

Lemus-Canovas M, Lopez-Bustins JA, Martin-Vide J, Royé D (2019). “synoptReg: An R package for computing a synoptic climate classification and a spatial regionalization of environmental data.” Environmental Modelling & Software, 118, 114 - 119. ISSN 1364-8152, doi: 10.1016/j.envsoft.2019.04.006, http://www.sciencedirect.com/science/article/pii/S1364815219300064.

Corresponding BibTeX entry:

  @Article{,
    title = {synoptReg: An R package for computing a synoptic climate
      classification and a spatial regionalization of environmental
      data},
    journal = {Environmental Modelling & Software},
    volume = {118},
    pages = {114 - 119},
    year = {2019},
    issn = {1364-8152},
    doi = {10.1016/j.envsoft.2019.04.006},
    url =
      {http://www.sciencedirect.com/science/article/pii/S1364815219300064},
    author = {Marc Lemus-Canovas and Joan A. Lopez-Bustins and Javier
      Martin-Vide and Dominic Royé},
  }