Citation
If you publish research that uses qtltools you have to cite it as follows:
Delaneau, O., Ongen, H., Brown, A. A., Fort, A., Panousis, N. I., & Dermitzakis, E. T. (2017). A complete tool set for molecular QTL discovery and analysis. Nature Communications, 8, 15452. https://doi.org/10.1038/ncomms15452