Linear Cellular Automata and Automatic Sequences. - Jean-Paul Allouche; Fritz von Haeseler; Ehler Lange; A. Petersen; Guentcho Skordev (Parallel Comput., 1997)

Fractal Patterns in Gaussian and Stirling Number Tables. - Ehler Lange; Heinz-Otto Peitgen; Guentcho Skordev (Ars Comb., 1998)