To cite dmdScheme in publications use:

Rainer M. Krug, Owen L. Petchey (2019). {dmdScheme}: An R package for working with Domain specific MetaData Schemes. Zenodo https://doi.org/10.5281/zenodo.3229614

Corresponding BibTeX entry:

  @Manual{,
    title = {{dmdScheme}: An R package for working with Domain specific
      MetaData Schemes},
    author = {Rainer M. Krug and Owen L. Petchey},
    journal = {Zenodo},
    year = {2019},
    doi = {10.5281/zenodo.3229614},
    url = {https://doi.org/10.5281/zenodo.3229614},
  }