Hamilton PB, Gibson WC, Stevens JR. Patterns of co-evolution between trypanosomes and their hosts deduced from ribosomal RNA and protein-coding gene phylogenies. Mol Phylogenet Evol. 2007 Jul;44(1):15-25. doi: 10.1016/j.ympev.2007.03.023. Epub 2007 Apr 13. PMID 17513135.