P. Buurman, Th. Pape, J.A. Reijneveld, F. de Jong, and E. van Gelder, “Laser-diffraction and pipette-method grain sizing of Dutch sediments: correlations for fine fractions of marine, fluvial, and loess samples”, njg, vol. 80, no. 1, pp. 49-57, Jun. 2001.