Verma, V. P. S., and S. P. Pant. “Effect of Width of Blaze and Stimulant (In Resin Tapping) on the Growth of Chirpine (<I>Pinus roxburghii< I> Sargent)”. Indian Forester, vol. 104, no. 1, Jan. 1978, pp. 36-41, doi:10.36808/if/1978/v104i1/11395.