Palmero, D., L. Gálvez, J. Gil-Serna, and S. Benito. “Short Communication. Rhizoctonia Solani As Causal Agent of Damping off of Swiss Chard in Spain”. Spanish Journal of Agricultural Research, Vol. 10, no. 4, Oct. 2012, pp. 1117-20, doi:10.5424/sjar/2012104-2754.