. Bharti, R. K. Gupta, P. K. Mahajan, and K. R. Sharma, “Temporal Stability Analysis of Resin Yield of Natural Regenerated Chir Pine (<I>Pinus roxburghii</I> Sargent) in Himachal Pradesh”, Indian Forester, vol. 142, no. 4, pp. 374–378, Apr. 2016.