D. Richardson

Tessellations with Local Transformations

D. Richardson, D. Richardson, 1972, J. Comput. Syst. Sci..

Continuous Self-Reproduction

D. Richardson, D. Richardson, 1976, J. Comput. Syst. Sci..

Computing the Topology of a Bounded Non-Algebraic Curve in the Plane

D. Richardson, 1992, J. Symb. Comput..