NAGA, K C, et al. “Relative Resistance of Indigenous and Exotic Accessions of Apple Against Woolly Apple Aphid (Eriosoma Lanigerum)”. The Indian Journal of Agricultural Sciences, vol. 89, no. 9, Sept. 2019, pp. 1547–1549, https://doi.org/10.56093/ijas.v89i9.93523.