Barton, Nicholas H. “The Hybrid Sink Effect.”10.1038/hdy.1980.23__Heredity, vol. 44, Springer Nature, 1980, pp. 277–78, doi:10.1038/hdy.1980.23.
LibreCat: https://research-explorer.ista.ac.at/record/3672
DOI: 10.1038/hdy.1980.23

Barton, Nicholas H. “The Fitness of Hybrids between Two Chromosomal Races of the Grasshopper Podisma Pedestris.”10.1038/hdy.1980.49__Heredity, vol. 45, Springer Nature, 1980, pp. 47–59, doi:10.1038/hdy.1980.49.
LibreCat: https://research-explorer.ista.ac.at/record/4335
DOI: 10.1038/hdy.1980.49

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