Journal article (2007) - NM Neykov (author), PN Neytchev (author), P. H A J M Gelder (author), Pieter Van van Gelder (author), P.H.A.J.M. Van Gelder (author), P. H A J M van Gelder (author), P.H.A.J.M. Gelder (author), Pieter Van Gelder (author), PHAJM van Gelder (author), PHAJM Van Gelder (author), Pieter H.A.J.M. Van Gelder (author), Pieter H.A.J.M. Gelder (author), P. H A J M Van Gelder (author), P. H.A.J.M. van Gelder (author), Pieter van Gelder (author), P. H.A.J.M. Gelder (author), Pieter Van Van Gelder (author), Pieter Van Gelder (author), Pieter van van Gelder (author), Pieter van Gelder (author), P. H.A.J.M. Van Gelder (author), Pieter Gelder (author), PHAJM Gelder (author), Pieter van Van Gelder (author), P.H.A.J.M. van Gelder (author), Pieter H.A.J.M. van Gelder (author), VK Todorov (author)