Minimal bi-invariant Hilbert subspaces of distributions on nilpotent Lie groups. Wiebe R. Pestman — 1995 Journal für die reine und angewandte Mathematik
Measurability of linear operators in the Skorokhod topology. Pestman, Wiebe R. — 1995 Bulletin of the Belgian Mathematical Society - Simon Stevin
A quick and simple proof of Sherman's theorem on order in C * -algebras. Pestman, Wiebe R. — 1996 Bulletin of the Belgian Mathematical Society - Simon Stevin