Bhat, Nisar, et al. “Seasonal Variation of Litter Production in <I>Fraxinus excelsior< I> Linn. And <I>Ulmus villosa< I> Brandis in Forests of Dachigam National Park (J&K)”. Indian Forester, vol. 135, no. 6, June 2009, pp. 825-30, doi:10.36808/if/2009/v135i6/643.