1985
Michel Danis and Jean-Jacques Royer.
in: Annales Geophysicae, 3:3 (357-364)
1984
Jean-Jacques Royer and Paulo-Cesar Vieira.
in: Geostatistics for Natural Resources Characterization, pages 691-702, D. Reidel Publishing Company
in: Science de la Terre, s{\'e}rie informatique, 20:1 (223-243)