Santoso, Dewi I.S., et al. “Effect of Long-Term Physical Training and Detraining on Myocyte Structure and Connective Tissue of Wistar rat’s Ventricle: Preliminary Experiment in Rats”. Medical Journal of Indonesia, vol. 20, no. 4, Nov. 2011, pp. 271-7, doi:10.13181/mji.v20i4.460.