Marisa, H., and S. P. Estuningsih. “HORMESIS PHENOMENA OF SOME PARAMETER ASPECT IN USAGE OF WATER LETTUCE (Pistia Stratiotes L.) FOR PHYTOREMEDIATION PROCESS OF PETROLEUM LIQUID WASTE”. BIOVALENTIA: Biological Research Journal, vol. 3, no. 1, May 2017, pp. 45-50, doi:10.24233/BIOV.3.1.2017.59.