To cite OmaDB in publications use:

  Kaleb K, Warwick Vesztrocy A, Altenhoff A and Dessimoz C (2019):
  Expanding the Orthologous Matrix (OMA) programmatic interfaces: REST
  API and the OmaDB packages for R and Python. F1000Research, URL:
  https://doi.org/10.12688/f1000research.17548.2

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Expanding the Orthologous Matrix (OMA) programmatic interfaces: REST API and the OmaDB packages for R and Python},
    author = {Klara Kaleb and Alex Warwick Vesztrocy and Adrian Altenhoff and Christophe Dessimoz},
    year = {2019},
    journal = {F1000Research},
    url = {https://doi.org/10.12688/f1000research.17548.2},
  }