S, Subha, et al. “In Vitro Differentiation of Adipose-Derived Mesenchymal Stem Cells into Cardiac Tissue-Linked Progenitor Cell Cluster Using Fibrin Matrix Based Niche”. Cardiology and Cardiovascular Medicine, vol. 4, no. 6, Nov. 2020, pp. 646-78, http://www.fortunejournals.org/ojs/index.php/ccm/article/view/15974.