P. H.  Harvey and Keymer, A. E., ?Comparing life histories using phylogenies?, Philosophical Transactions of the Royal Society of London, Series B, vol. 332, no. 1262, pp. 31 - 39, 1991.

R. A.  Hellenthal and Price, R. D., ?Two new subgenera of chewing lice (Phthiraptera: Trichodectidae) from pocket gophers (Rodentia: Geomyidae), with a key to all included taxa?, Journal of Medical Entomology, vol. 31, no. 3, pp. 450-466, 1994.

R. A.  Hellenthal and Price, R. D., ?Biosystematics of the chewing lice of pocket gophers?, Annual Review of Entomology, vol. 36, pp. 185 - 203, 1991.