V. P. Khanduri & C. M. Sharma. “POLLEN PRODUCTION IN RELATION TO POLLINATION BEHAVIOUR IN SOME MULTIPURPOSE HIMALAYAN TREES”. Journal of Tropical Forest Science (JTFS), vol. 13, no. 2, Sept. 2022, pp. 394-6, https://jtfs.frim.gov.my/jtfs/article/view/1358.