BUTA SINGH DHILLON and P.K. SHARMA, “Physiology, growth and productivity of staggered sown spring sunflower (Helianthus annuus) in response to varying intra-row spacing and applied nitrogen in the Indo-Gangetic Plains”, IJA, vol. 62, no. 4, pp. 496–504, Apr. 2024, doi: 10.59797/ija.v62i4.5558.