R. N. YADAV, et al. “Effect of Sowing Dates and Day Hours on Nectar Production and Frequency of Honeybee Visits in Parental Lines of Sunflower Hybrid APSH-11¹”. Seed Research, vol. 35, no. 1, Mar. 2025, pp. 1-5, https://doi.org/10.56093/sr.v35i1.165585.