Srivastava, U. S. und Srivastava, P. D. (1961) „On the Hydrogen-Ion Concentration in the Alimentary Canal of the Coleoptera.“, Beiträge zur Entomologie = Contributions to Entomology, 11(1-2), S. 15-20. doi: 10.21248/contrib.entomol.11.1-2.15-20.