Conference paper (2001) - PHAJM Van Gelder (author), Pieter Van Van Gelder (author), Pieter H.A.J.M. Gelder (author), P. H.A.J.M. van Gelder (author), Pieter van Gelder (author), Pieter H.A.J.M. van Gelder (author), P. H.A.J.M. Van Gelder (author), PHAJM Gelder (author), Pieter Van Gelder (author), P.H.A.J.M. van Gelder (author), P. H A J M Gelder (author), Pieter Gelder (author), Pieter van Van Gelder (author), P. H A J M van Gelder (author), PHAJM van Gelder (author), Pieter Van van Gelder (author), Pieter van van Gelder (author), Pieter H.A.J.M. Van Gelder (author), P. H A J M Van Gelder (author), Pieter van Gelder (author), P.H.A.J.M. Van Gelder (author), Pieter Van Gelder (author), P.H.A.J.M. Gelder (author), P. H.A.J.M. Gelder (author), J.G. de Ronde (author), NM Neykov (author), P Neytchev (author)