On the law of one price. - Jean-Michel Courtault; Freddy Delbaen; Yuri Kabanov; Christophe Stricker (Finance Stochastics, 2004)

A Note on Luenberger's Zero-Maximum Principle for Core Allocations. - Jean-Michel Courtault; Bertrand Crettez; Naïla Hayek (IGTR, 2007)

A note on Boiteux' surplus function and dual Pareto efficiency. - Jean-Michel Courtault; Bertrand Crettez; Naïla Hayek (Math. Soc. Sci., 2008)