The only examples available in the literature to show that the Weak Axiom of Revealed Preference does not imply the Strong Axiom of Revealed Preference, the examples of Gale and Shafer, apply only to the case of three commodities. This paper constructs examples for four or more commodities.

SARP, WARP, economic theory
Mathematical Methods and Programming: General (jel C60), Consumer Economics: Theory (jel D11),
Journal of Economic Theory
Erasmus School of Economics

Peters, H.J.M. (1994). WARP Does Not Imply SARP for More Than Two Commodities. Journal of Economic Theory, 62(1), 152–160. doi:10.1006/jeth.1994.1008