Mullen, K.M., Ardia, D., Gil, D.L., Windover, D. and Cline, J. 2011. DEoptim: An R Package for Global Optimization by Differential Evolution. Journal of Statistical Software. 40, 6 (Apr. 2011), 1–26. DOI:https://doi.org/10.18637/jss.v040.i06.