Citation
If you publish research that uses qapa you have to cite it as follows:
Ha, K. C. H., Blencowe, B. J., & Morris, Q. (2018). QAPA: a new method for the systematic analysis of alternative polyadenylation from RNA-seq data. Genome Biology, 19(1), 45. https://doi.org/10.1186/s13059-018-1414-4