J. Bahadur, “The structure and development of the Malpighian tubules of an aquatic bug: Sphaerodema rusticum Linnaeus (Hemiptera)”., contrib.entomol., vol. 18, no. 1-2, pp. 239–247, Mar. 1968, doi: 10.21248/contrib.entomol.18.1-2.239-247.