1. A. Engstrom, Quantitative Microchemical and Histochemical Analysis of Elements by X-rays, Nature
158, 664 (1946).
2. A. Engstrom, Microradiography in Biological and Medical Research, Medica Mundi
1, 119 (1955).
3. R. Amprino, and A. Engstrom, Studies on X-ray Absorption and Diffraction of Bone Tissue, Acta Anat. 15, 1 (1952).
4. C. Lagergren, Biophysical Investigations of Urinary Calculi: An X-ray Crystallographic and Microradiographic study, Thesis, Acta Radiol., Suppl. 133 (1956).
5. K. A. Omnell, B. Lindstrom, F. C. Hoh, and E. Hammerlund-Essler, Method for Non-destructive Determination of Inorganic and Organic Material in Mineralized Tissues, Acta Radiol. 54, 209 (1960).