M. C. G. P. de O. G. Wolmir José Böckel , Tran., “Polyphenol and Resveratrol Content in Grape Juices Organically and Conventionally Produced in Southern Brazil”, int.jour.sci.res.mana, vol. 5, no. 3, pp. 5182–5185, Mar. 2017, doi: 10.18535/ijsrm/v5i3.01.