Barton NH. The hybrid sink effect. Heredity. 1980;44:277-278. doi:10.1038/hdy.1980.23
LibreCat: https://research-explorer.ista.ac.at/record/3672
DOI: 10.1038/hdy.1980.23

Barton NH. The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris. Heredity. 1980;45:47-59. doi:10.1038/hdy.1980.49
LibreCat: https://research-explorer.ista.ac.at/record/4335
DOI: 10.1038/hdy.1980.49

Hewitt G, Barton NH. The structure and maintenance of hybrid zones as exemplified by Podisma pedestris. In: Blackman R, Ashburner M, eds. Insect Cytogenetics. Vol 10. Wiley-Blackwell; 1980:149-170.
LibreCat: https://research-explorer.ista.ac.at/record/4334