Weber, Hans Hermann Max Planck Institute for Medical Research, Max Planck Society;
Rüegg, Johann Caspar Max Planck Institute for Medical Research, Max Planck Society;
http://scholarscompass.vcu.edu/cgi/viewcontent.cgi?article=1073&context=mcvq (Any fulltext)
Weber, H. H., & Rüegg, J. C. (1966). The contractile fine structure of vertebrate smooth muscle. Medical college of virginia quarterly, 2(2), 72-77.