D. Stoyan, H. Stoyan, A. Tscheschel, and T. Mattfeldt, “ON THE ESTIMATION OF DISTANCE DISTRIBUTION FUNCTIONS FOR POINT PROCESSES AND RANDOM SETS”, Image Anal Stereol, vol. 20, no. 1, pp. 65–69, May 2011, doi: 10.5566/ias.v20.p65-69.