^J. Dieudonné (1966). “Sur la séparation des ensembles convexes”. Math. Ann.163: 1–3. doi:10.1007/BF02052480.
^Zălinescu, Constantin (2002). Convex analysis in general vector spaces. River Edge, NJ: World Scientific Publishing Co., Inc.. pp. 6–7. ISBN981-238-067-1. MR1921556