Rational complexity of binary sequences, FℚSRs, and pseudo-ultrametric continued fractions in ℝ. - Michael Vielhaber 001; Mónica del Pilar Canales Chacon; Sergio Jara Ceballos (Cryptogr. Commun., 2022)

Friedman's "Long Finite Sequences": The End of the Busy Beaver Contest. - Michael Vielhaber 001; Mónica del Pilar Canales Chacon; Sergio Jara Ceballos (CoRR, 2023)