S. V. YAMGAR, et al. “ESTIMATION OF HETEROSIS FOR YIELD AND YIELD CONTRUBUTING CHARACTERS IN SUNFLOWER (HELIANTHUS ANNUUS L.)”.
The Bioscan
, vol. 10, no. Supplement 4, Oct. 2015, pp. 1991-6, https://thebioscan.com/index.php/pub/article/view/1783.