Gul, A., Tuzel, Y., Tuzel, I.H., Irget, M.E., Kidoglu, F. and Tepecik, M. 2011. Effects of nutrition and irrigation on sweet pepper production in volcanic tuff. Spanish Journal of Agricultural Research. 9, 1 (Mar. 2011), 221-229. DOI:https://doi.org/10.5424/sjar/20110901-368-09.