The probability of peak shifts in a founder population
S. Rouhani, N.H. Barton, Journal of Theoretical Biology 126 (1987) 51–62.

The frequency of shifts between alternative equilibria
N.H. Barton, S. Rouhani, Journal of Theoretical Biology 125 (1987) 397–418.

Sibling competition and the advantage of mixed families
N.H. Barton, R.J. Post, Journal of Theoretical Biology 120 (1986) 381–387.