When using ProDy or NMWiz in published work, please cite:

Bakan A, Meireles LM, Bahar I.
ProDy: Protein Dynamics Inferred from Theory and Experiments.
Bioinformatics 2011 27(11):1575-1577.

When using pairwise2 or KDTree modules in published work, please cite:

Cock PJ, Antao T, Chang JT, Chapman BA, Cox CJ, Dalke A, Friedberg I, Hamelryck T, Kauff F, Wilczynski B, de Hoon MJ.
Biopython: freely available Python tools for computational molecular biology and bioinformatics.
Bioinformatics 2009 25(11):1422-3.