Cuadrado-García, Leidy Natalia, et al. “Nitrogen Influence in the Production of Tomato (Lycopersicum Esculentum L.) Seeded in Substrate in Sutamarchán (Boyacá)”. Ciencia Y Agricultura, vol. 11, no. 1, Jan. 2014, pp. 85-90, doi:10.19053/01228420.3491.