Rishabh Mohan, et al. “A Stochastic Frontier Production Function to Measure the Technical Efficiency of the Farmer of Apple (Malus Pumila) Production and Productivity”. Journal of the Indian Society of Agricultural Statistics, vol. 76, no. 1, Sept. 2025, pp. 17-22, https://doi.org/10.56093/jisas.v76i1.172116.