Pitamber Singh Negi, and Sandeep Sharma. “Effect of Different Concentrations of Gibberellic Acid on Seed Germination Behaviour and Seedling Vigour Index of Betula Utilis D. Don”. Annals of Arid Zone 64, no. 2 (June 27, 2025): 199–204. Accessed October 21, 2025. https://epubs.icar.org.in/index.php/AAZ/article/view/161434.