Second-order analysis by variograms for curvature measures of two-phase structures C. H. Arns, J. Mecke, K. Mecke and D. Stoyan Eur. Phys. J. B, 47 3 (2005) 397-409 Published online: 28 October 2005 DOI: 10.1140/epjb/e2005-00338-5