Main group 1

• Johansson, Sverker, Origins of language: constraints on hypotheses, Amsterdam ; Philadelphia, PA, John Benjamins Pub., 2005

Main group 2

• Johansson, Sverker, Language Abilities in Neanderthals, Part of: Annual Review of Linguistics, vol. 1(2), 2015, p. 1–22
• Galantucci, Bruno, An Experimental Study of the Emergence of Human Communication Systems, Part of: Cognitive science: a multidisciplinary journal of artificial intelligence, psychology, and language: [official journal of the Cognitive Science Society], vol. 29, 2005, p. 737–767
• Hammarström, Harald, Linguistic Diversity and Language Evolution, Part of: Journal of Language Evolution, vol. 1(1), 2016, p. 19–29
• Zuberbühler, KLaus, Linguistic Prerequisites in the Primate Lineage, Part of: Language origins: perspectives on evolution, Oxford, Oxford University Press, 2005, p. 262–282
• Pagel, Mark, Q&A: What is human language, when did it evolve and why should we care?, Part of: BMC biology., vol. 15(64), 2017, p. 1–6
• Call, Josep, Does the chimpanzee have a theory of mind? 30 years later, Part of: Trends in cognitive sciences., vol. 12(5), 2008, p. 187–192
• Zuidema, Willem, Compositional Semantics, ., 2005