To cite package ‘CovCombR’ in publications use:

  Adventures in Multi-Omics I: Combining heterogeneous data sets via
  relationships matrices, Deniz Akdemir and Julio Isidro Sanchez.
  bioRxiv 857425; doi: 10.1101/857425

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Adventures in Multi-Omics I: Combining heterogeneous data sets via relationships matrices},
    author = {Deniz Akdemir and Julio Isidro Sanchez},
    journal = {biorxiv},
    year = {2019},
  }