Kershenbaum, A., Demartsev, V., Gammon, D. E., Geffen, E., Gustison, M. L., Ilany, A., et al. (2020).
Shannon entropy as a robust estimator of Zipf's Law in animal vocal communication repertoires. Methods
in Ecology and Evolution, 12(3), 553-564. doi:10.1111/2041-210X.13536.