Hewitt, Godfrey, and Nicholas H. Barton. “The Structure and Maintenance of Hybrid Zones as Exemplified by Podisma Pedestris.” Insect Cytogenetics, edited by Roger Blackman and Michael Ashburner, vol. 10, Wiley-Blackwell, 1980, pp. 149–70.
LibreCat: https://research-explorer.ista.ac.at/record/4334