Permutation Entropy: New Ideas and Challenges. - Karsten Keller; Teresa Mangold; Inga Stolz; Jenna Werner (Entropy, 2017)

A General Symbolic Approach to Kolmogorov-Sinai Entropy. - Inga Stolz; Karsten Keller (Entropy, 2017)

Algorithmics, Possibilities and Limits of Ordinal Pattern Based Entropies. - Albert B. Piek; Inga Stolz; Karsten Keller (Entropy, 2019)