Ramón Ferrer, J., and E. Sánchez Jaimes. “Preparing a Nutrient Solution for Hidroponic Cultures by Using Waste Mash from the Vitis vinífera L. Grape”. Rev. Téc. Fac. Ing. Univ. Zulia, Vol. 17, no. 3, Feb. 2011, https://mail.produccioncientificaluz.org/index.php/tecnica/article/view/5458.