Cargnelutti Filho, Alberto, and Lindolfo Storck. “Measures of Experimental Precision Degree in Corn Cultivar Competition Trials”. Pesquisa Agropecuaria Brasileira, vol. 44, no. 2, Nov. 2010, pp. 111-7, doi:10.1590/S1678-3921.pab2009.v44.1486.