He, Mingfeng; Lin, Jing; Jiang, Heng; Liu, Xin - In: Physica A: Statistical Mechanics and its Applications 312 (2002) 1, pp. 243-250
In Penna's single-species asexual bit-string model of biological ageing, the Verhulst factor has too strong a restraining effect on the development of the population. Danuta Makowiec gave an improved model based on the lattice, where the restraining factor of the four neighbours take the place...