D. C. Chaudhari, D. N. Uniyal, and M. P. Shiva, “Comparative Studies on the Healing Rant of Blazes Tapped by ’Cup Lip’ Method (Channels) and ’Rill method’ (Rills) in <I>Pinus roxrurghii</I>”;, Indian Forester, vol. 114, no. 8, pp. 446–452, Aug. 1988.