1. Mathematical Snapshots;Steinhaus,1960
2. Sur la division pragmatique;Steinhaus;Econometrica (supplement),1949
3. Aha! Insight;Gardner,1978
4. How to cut a cake fairly;Dubins;Amer. Math. Monthly,1961
5. How to cut a cake fairly;Stromquist;Amer. Math. Monthly,1980