Citation
If you publish research that uses goatools you have to cite it as follows:
Klopfenstein, D. V., Zhang, L., Pedersen, B. S., Ramírez, F., Vesztrocy, A. W., Naldi, A., Mungall, C. J., Yunes, J. M., Botvinnik, O., Weigel, M., Dampier, W., Dessimoz, C., Flick, P., … Tang, H. (2018). GOATOOLS: A Python library for Gene Ontology analyses. Scientific Reports, 8, Article 10872. https://doi.org/10.1038/s41598-018-28948-z