ÅSTRÖM , E., G. FRIMAN, and L. PILSTRÖM. “Human Skeletal Muscle in Viral and Mycoplasma Infections: Ultrastructural Morphometry and Its Correlations to Enzyme Activities”. Upsala Journal of Medical Sciences, vol. 82, no. 3, Sept. 1977, pp. 191-4, doi:10.3109/03009737709179099.