Hybrid zones and speciation
N.H. Barton, G. Hewitt, in:, W. Atchley, D. Woodruff (Eds.), Evolution and Speciation, Cambridge University Press, 1981, pp. 109–145.

The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris
N.H. Barton, G. Hewitt, Heredity 47 (1981) 367–383.

The hybrid sink effect
N.H. Barton, Heredity 44 (1980) 277–278.

The structure and maintenance of hybrid zones as exemplified by Podisma pedestris
G. Hewitt, N.H. Barton, in:, R. Blackman, M. Ashburner (Eds.), Insect Cytogenetics, Wiley-Blackwell, 1980, pp. 149–170.

The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris
N.H. Barton, Heredity 45 (1980) 47–59.

Gene flow past a cline
N.H. Barton, Heredity 43 (1979) 333–339.

The dynamics of hybrid zones
N.H. Barton, Heredity 43 (1979) 341–359.

A hybrid zone in the alpine grasshopper Podisma pedestris
N.H. Barton, A Hybrid Zone in the Alpine Grasshopper Podisma Pedestris, University of East Anglia, 1979.