Cafe Industry (15 de agosto de 2011). «TORQ Natural Instant Coffee». Cafe Culture. Archivado desde el original el 14 de junio de 2013. Consultado el 22 de octubre de 2012.
Ramalakshmi, K.; Rao, L. Jagan Mohan; Takano-Ishikawa, Yuko; Goto, Masao (2009). «Bioactivities of low-grade green coffee and spent coffee in different in vitro model systems». Food Chemistry115 (1): 79-85. ISSN0308-8146. doi:10.1016/j.foodchem.2008.11.063.
Howe, G.; Burch, J.; Miller, A.; Cook, G.; Esteve, J.; Morrison, B.; Gordon, P.; Chambers, L.; Fodor, G.; Winsor, G. M. «Tobacco use, occupation, coffee, various nutrients, and bladder cancer». Journal of the National Cancer Institute. 1980. 64 (4): 701–713. PMID6928984. doi:10.1093/jnci/64.4.701.
Pelucchi, C., La Vecchia, C. «Alcohol, coffee, and bladder cancer risk: a review of epidemiological studies». Eur. J. Cancer Prev. 2012. 18 (1): 62–68. PMID19077567. doi:10.1097/CEJ.0b013e32830c8d44.
Ramalakshmi, K.; Rao, L. Jagan Mohan; Takano-Ishikawa, Yuko; Goto, Masao (2009). «Bioactivities of low-grade green coffee and spent coffee in different in vitro model systems». Food Chemistry115 (1): 79-85. ISSN0308-8146. doi:10.1016/j.foodchem.2008.11.063.
Howe, G.; Burch, J.; Miller, A.; Cook, G.; Esteve, J.; Morrison, B.; Gordon, P.; Chambers, L.; Fodor, G.; Winsor, G. M. «Tobacco use, occupation, coffee, various nutrients, and bladder cancer». Journal of the National Cancer Institute. 1980. 64 (4): 701–713. PMID6928984. doi:10.1093/jnci/64.4.701.
Pelucchi, C., La Vecchia, C. «Alcohol, coffee, and bladder cancer risk: a review of epidemiological studies». Eur. J. Cancer Prev. 2012. 18 (1): 62–68. PMID19077567. doi:10.1097/CEJ.0b013e32830c8d44.
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Cafe Industry (15 de agosto de 2011). «TORQ Natural Instant Coffee». Cafe Culture. Archivado desde el original el 14 de junio de 2013. Consultado el 22 de octubre de 2012.