The p -adic finite Fourier transform and theta functions. Van Steen, G. — 1997 Bulletin of the Belgian Mathematical Society - Simon Stevin
A basis for the non-archimedean holomorphic theta functions. Van Steen, G. — 1994 Bulletin of the Belgian Mathematical Society - Simon Stevin
The reduction of a double covering of a Mumford curve. Van Steen, G. — 1994 Bulletin of the Belgian Mathematical Society - Simon Stevin