Quer, J., Cecchetto, C., Donati, C., Geraci, C., Kelepir, M., Pfau, R. & Steinbach, M. (2017). SignGram Blueprint: A Guide to Sign Language Grammar Writing.
Bourgeois-Gironde, S. (2020). The Mind under the Axioms. Elsevier. doi:10.1016/C2017-0-02647-2
Kriegel, U. (2017). The Routledge Handbook of Franz Brentano and the Brentano School.