Asaad, N., Bethel, P. A., Coulson, M. D., Dawson, J. E., Ford, S. J., Gerhardt, S., … Steinbacher, S. (2009). Dipeptidyl nitrile inhibitors of Cathepsin L. Bioorganic and Medicinal Chemistry Letters, 19(15), 4280-4283. https://doi.org/10.1016/j.bmcl.2009.05.071