, 2003, 'The emergence of Prägnanz: Gaetano Kanizsa's legacies', Axiomathes 13 (3-4), 365-387.
, 2001, Representation in psychophysics, in L. Albertazzi (ed.), The dawn of cognitive science, Dordrecht, Springer, pp. 89-101.
, 2000, Self-organisation in perception the case of motion, in A. Carsetti (ed.), Functional models of cognition, Dordrecht, Springer, pp. 91-100.
, 1999, On Prägnanz, in L. Albertazzi (ed.), Shapes of forms, Dordrecht, Springer, pp. 123-148.
, 1994, Visual thinking: stability and self-organisation, in V. Cantoni (ed.), Human and machine vision, Dordrecht, Springer, pp. 277-287.
with Kanizsa, G. , 1990a, The phenomenology of autonomous order formation in perception, in H. Haken & M. Stadler (eds.), Synergetics of cognition, Dordrecht, Springer, pp. 186-200.