R. M. Wittig, „Chimpanzee cultures – a search for clues“, in Being Human: The Beginnings of Our Culture. Accompanying volume to the special exhibition 5 May 2021 – 27 March 2022, Archäologisches Museum Frankfurt, L. Giemsch und M. N. Haidle, Hrsg. Heidelberg: Propylaeum, 2023, S. 122–135. doi: 10.11588/propylaeum.1173.c16154.