1. 1) C. Spence, ``Crossmodal correspondences: A tutorial review,'' Attent. Percept. Psychophys., 73, 971-995 (2011).
2. 2) L. E. Marks, ``Cross-modal interactions in speeded classification,'' in Handbook of Multisensory Processes, G. A. Calvert, C. Spence and B. E. Stein, Eds. (MIT Press, Cambridge, MA, 2004), pp. 85-105.
3. 3) C. Spence, ``Crossmodal correspondences: A tutorial review,'' in Senses and Sensation: Critical and Primary Sources, D. Howes, Ed., Vol. III (Bloomsbury Academic, London, 2018), pp. 91-125. https://www.bloomsbury.com/uk/senses-and-sensation-9781474274050/ (accessed 20 Oct. 2018).
4. 4) C. V. Parise and C. Spence, ``Audiovisual crossmodal correspondences in the general population,'' in The Oxford Handbook of Synesthesia, J. Simner and E. M. Hubbard, Eds. (Oxford University Press, Oxford, 2013), pp. 790-815.
5. 5) K. M. Knöferle and C. Spence, ``Crossmodal correspondences between sounds and tastes,'' Psychon. Bull. Rev., 19, 992-1006 (2012).