Nutt, D.; King, L. A.; Saulsbury, W.; Blakemore, C. (2007). „Development of a rational scale to assess the harm of drugs of potential misuse”. The Lancet. 369 (9566): 1047—1053. PMID17382831. S2CID5903121. doi:10.1016/S0140-6736(07)60464-4.
Nutt, D.; King, L. A.; Saulsbury, W.; Blakemore, C. (2007). „Development of a rational scale to assess the harm of drugs of potential misuse”. The Lancet. 369 (9566): 1047—1053. PMID17382831. S2CID5903121. doi:10.1016/S0140-6736(07)60464-4.
Nutt, D.; King, L. A.; Saulsbury, W.; Blakemore, C. (2007). „Development of a rational scale to assess the harm of drugs of potential misuse”. The Lancet. 369 (9566): 1047—1053. PMID17382831. S2CID5903121. doi:10.1016/S0140-6736(07)60464-4.