1. Anonymous. (2013). State Department of Horticulture, Govt. of Himachal Pradesh. Shimla
2. Awasthi, R.P., H.S. Verma, R.D., Sharma, S.P., Bhardwaj, and S.V. Bhardwaj. (2001). Causes of low productivity in apple orchards and suggested remedial measures. Editors: Jindal, K. K. & D. R. Gautam. In: Productivity of Temperate Fruits. Solan: Dr. Y.S. Parmar University of Horticulture and Forestry: 1–8
3. Byrne, D.H. and T.A., Bacon. (1992). Chilling estimation: its importance and estimation. The Texas Horticulturist. 18: 8–9
4. Caprio, J.M. and H.A., Quamme. (1999). Weather conditions association with apple production in the Okanagan valley of British Columbia. Canadian Journal of Plant Science. 79: 129-137 https://doi.org/10.4141/P98-028
5. Cleland, E.E., I. Chuine, A., Menzel, H.A., Mooney and M.D. Schwartz. (2007). Shifting plant phenology in response to global change. Trends in Ecology and Evolution. 72(7): 357-364 https://doi.org/10.1016/j.tree.2007.04.003
6. Ghosh, S.P. (1999). Deciduous fruit production in India. Editors: Papademetriou, M.K. & E.M. Herath, In: Deciduous fruit production in Asia and the Pacific. Thailand: Regional Office for Asia and the Pacific, Food and Agricultural Organization. 38-56
7. Ghrab, M., M.B. Mimoun, M.M., Masmoudi and N.B., Mechlia. (2014). Chilling trends in a warm production area and their impact on flowering and fruiting of fruit trees. Scientia Horticulturae. 178: 87-94 https://doi.org/10.1016/j.scienta.2014.08.008
8. Henson, R. (2006). The Rough Guide to Climate Change. Rough Guides, London, New York
9. Kumar, S., L.M., Tewari and A., Tewari. (2010). Phenological studies of Rhodendron arboretum Smith. Family: Ericaceae in Nainital catchment, Kumaon Himalaya. Mountain biodiversity and impact of climate change. GBPIHED, Kosi katarmal Almora, 6-8 December
10. Lobell, D.B. and M.B., Burke. (2008). Why are agricultural impacts of climate change so uncertain? The importance of temperature relative to precipitation. Environment Research Letters 3, 034007:1-8 https://doi.org/10.1088/1748-9326/3/3/034007
11. Parmesan, C. and G., Yohe. (2003). A globally coherent fingerprint of climate change impacts across natural systems. Nature. 421: 37-42 https://doi.org/10.1038/nature01286
12. Partap, U. and T., Partap. (2002). Warning Signals from the Apple Valleys of the Hindu Kush-Himalayas. Editor: Shreshtha, A. B. M. In: Productivity Concerns and Pollination Problems. Kathmandu. Centre for Integrated Mountain Development. 104
13. Rana, P. K., P., Kumar, V. K., Singhal and J. C., Rana. (2014). Uses of Local Plant Biodiversity among the Tribal Communities of Pangi Valley of District Chamba in Cold Desert Himalaya, India. The Scientific World Journal. 15 https://doi.org/10.1155/2014/753289
14. Rana, R.S., R.M. Bhagat, V., Kalia and H., Lal. (2008). Impact of climate change on shift of apple belt in Himachal Pradesh. In: ISPRS Archies XXXVIII-8/W3 Workshop Proceedings; Impact of Climate Change on Agriculture. 131-137
15. Rautela, P. and B., Karki. (2015). Impact of Climate Change on Life and Livelihood of Indigenous People of Higher Himalaya in Uttarakhand, India. American Journal of Environmental Protection. 3(4): 112-124
16. Rees, G.H. and D.N., Collins. (2006). Regional differences in response of flow in glacier-fed Himalayan Rivers to climate warming. Hydrological Processes. 20: 2157-2167 https://doi.org/10.1002/hyp.6209
17. Sharma, A. and S.P., Singh. (2004). Survival of brown oak forest in the Himalaya in the face of global climate change coupled with anthropogenic factors. In: The 18th Annual Meeting of Society for Conservation Biology- Conservation in an urbanized world. Columbia University New York, USA. 257-258
18. Singh, S.P. and V., Singh. (2013). Certain observed and likely ecological responses to climate change in Central Himalaya. Climate Change and Environmental Sustainability. 1(1):73-80 https://doi.org/10.5958/j.2320-6411.1.1.007
19. Thadani, R., V., Singh, D.S., Chauhan, V., Dwivedi and A., Pandey. (2015). Climate change in Uttarakhand. Bishen Singh Mahendra Pal Singh, Dehradun
20. Thuiller, W. (2007). Biodiversity: Climate change and the ecologist. Nature. 448 https://doi.org/10.1038/448550a
21. Wheeler, T.R., P. Q., Craufurd, R. H., Ellis, J. R., Porter and P. V. Prasad. (2000). Temperature variability and the yield of annual crops. Agriculture, Ecosystems and Environment. 82: 159-167 https://doi.org/10.1016/S0167-8809(00)00224-3