1. 1968 External and trabecular morphologic changes in lumbar vertebrae in aging. In: Progress in Methods of Bone Mineral Measurements. and eds. U. S. Department of Health, Education and Welfare, Bethesda, pp 370-409.
2. 1983 Applications of the coarea formula to stereology. In: Proceedings of the Second International Workshop on Stereology and Stochastic Geometry. and eds. Dpt. Theoretical Statistics, University of Aarhus.
3. Estimation of surface area from vertical sections