1. A Treatise of Human Nature;Hume,1738
2. Grundriss der Psychologie;Wundt,1896
3. Evolutionary roads to syntax;Zuberbühler;Anim. Behav.,2019
4. Syntax and compositionality in animal communication;Zuberbühler;Philos. Trans. R. Soc. B,2019
5. Compositionality in animals and humans;Townsend;PLoS Biol.,2018