To cite package ‘epwmap’ in publications use:

Jia H (2021). epwmap: Visualize EPW Sources in Interactive Maps. R package version 0.0.0.9000, https://github.com/hongyuanjia/epwmap.

Corresponding BibTeX entry:

  @Manual{,
    title = {epwmap: Visualize EPW Sources in Interactive Maps},
    author = {Hongyuan Jia},
    year = {2021},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/hongyuanjia/epwmap},
  }