Frank, S., Zhang, M., Schöler, H. R., & Greber, B. (2012). Small Molecule-Assisted, Line-Independent Maintenance of Human Pluripotent Stem Cells in Defined Conditions. PLoS ONE, 7(7):, pp. e41958-1-e41958-13. Retrieved from http://dx.doi.org/10.1371/journal.pone.0041958.