Barton, Nicholas H, and Godfrey Hewitt. “A Chromosomal Cline in the Grasshopper Podisma Pedestris.”https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x__Evolution; International Journal of Organic Evolution. Wiley-Blackwell, 1981.https://doi.org/ 10.1111/j.1558-5646.1981.tb04966.x .
LibreCat: https://research-explorer.ista.ac.at/record/3670
DOI:  10.1111/j.1558-5646.1981.tb04966.x
PMID: 28581059

Barton, Nicholas H. “The Width of the Hybrid Zone in Caledia Captiva.”https://doi.org/10.1038/hdy.1981.86__Heredity. Nature Publishing Group, 1981.https://doi.org/10.1038/hdy.1981.86 .
LibreCat: https://research-explorer.ista.ac.at/record/3671
DOI: 10.1038/hdy.1981.86

Edelsbrunner, Herbert, and Hermann Maurer. “A Space-Optimal Solution of General Region Location.”https://doi.org/10.1016/0304-3975(81)90103-1__Theoretical Computer Science. Elsevier, 1981.https://doi.org/10.1016/0304-3975(81)90103-1 .
LibreCat: https://research-explorer.ista.ac.at/record/4133
DOI: 10.1016/0304-3975(81)90103-1

Edelsbrunner, Herbert, and Hermann Maurer. “On the Intersection of Orthogonal Objects.”https://doi.org/10.1016/0020-0190(81)90053-3__Information Processing Letters. Elsevier, 1981.https://doi.org/10.1016/0020-0190(81)90053-3 .
LibreCat: https://research-explorer.ista.ac.at/record/4132
DOI: 10.1016/0020-0190(81)90053-3

Barton, Nicholas H, and Godfrey Hewitt. “Hybrid Zones and Speciation.” In Evolution and Speciation, edited by William Atchley and David Woodruff, 109–45. Cambridge University Press, 1981.
LibreCat: https://research-explorer.ista.ac.at/record/4332

Barton, Nicholas H, and Godfrey Hewitt. “The Genetic Basis of Hybrid Inviability between Two Chromosomal Races of the Grasshopper Podisma Pedestris.”https://doi.org/10.1038/hdy.1981.98__Heredity. Springer Nature, 1981.https://doi.org/10.1038/hdy.1981.98 .
LibreCat: https://research-explorer.ista.ac.at/record/4333
DOI: 10.1038/hdy.1981.98