Santoso, D. I., S. O. Lontoh, P. E. Wuyung, and S. Endardjo. “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.