Roger Bivand / Barry Rowlingson / Daniel Morissette / Friedrich Leisch / Nicholas Lewin-Koh / Peter J. Diggle / Paulo J. Ribeiro / Jr. / Ole F. Christensen / Markus Neteler / Paulo J. Ribeiro / Martin Schlather / Albrect Gebhardt / Kurt Hornik / Moliner / Achim Zeileis / /