Venkata Sai Prakash Chaturvedula, John F. Clos, Joshua Rhea, Dennis Milanowski, Ulla Mocek, Grant E. DuBois, Indra Prakash: Minor diterpenoidglycosides from the leaves of Stevia rebaudiana; Phytochemistry Letters, Vol. 4 (3), September 2011, S. 209–212. doi:10.1016/j.phytol.2011.01.002