Sen, R. N.; Gangulgi, A. K.; Ray, G. G.; De, A; Chakrabarti, D. (1983), "Tea-leaf plucking-workloads and environmental studies", Ergonomics, 26 (9): 887–893, doi:10.1080/00140138308963416, PMID6641696
Ravichandran, Ramaswamy; Parthiban, Ramaswamy (September 1998), "The impact of mechanization of tea harvesting on the quality of south indian CTC teas", Food Chemistry, 63 (1): 61–64, doi:10.1016/s0308-8146(97)00219-7
Sen, R. N.; Gangulgi, A. K.; Ray, G. G.; De, A; Chakrabarti, D. (1983), "Tea-leaf plucking-workloads and environmental studies", Ergonomics, 26 (9): 887–893, doi:10.1080/00140138308963416, PMID6641696