F. B. Neto, E. G. Gomes, G. H. de S. Nunes, and A. P. B. Júnior, “Multidimensional analysis of carrot-lettuce intercroppings under different combinations of population densities”, PAB, vol. 42, no. 12, pp. 1697–1704, Dec. 2007, doi: 10.1590/S1678-3921.pab2007.v42.7751.