Maciel, G. M., F. J. Carvalho, M. A. R. Fernandes, I. F. Beloti, and C. S. de oliveira. “Genetic, Environmental Effects and Storage Period in Onion Seeds Quality”. Bioscience Journal, vol. 31, no. 6, Nov. 2015, pp. 1634-42, doi:10.14393/BJ-v31n6a2015-30213.