Citation
If you publish research that uses clark you have to cite it as follows:
Ounit, R., Wanamaker, S., Close, T. J., & Lonardi, S. (2015). CLARK: Fast and accurate classification of metagenomic and genomic sequences using discriminative k-mers. BMC Genomics, 16, 236. https://doi.org/10.1186/s12864-015-1419-2