Citation
If you publish research that uses hal you have to cite it as follows:
Glenn Hickey, Benedict Paten, Dent Earl, Daniel Zerbino, and David Haussler. HAL: A Hierarchical Format for Storing and Analyzing Multiple Genome Alignments. Bioinformatics. 2013. Advance Online Access https://doi.org/10.1093/bioinformatics/btt128