Can you please add a `References` section to this docstring and add the Sokal and Rohlf reference there, linking to it from within the `Notes` section? For an example of this, see [here](http://scikit-bio.org/generated/skbio.math.diversity.alpha.michaelis_menten_fit.html#skbio.math.diversity.alpha.michaelis_menten_fit).