Sackett, D.L. (2001), "Why randomized controlled trials fail büt needn't: 2. Failüre to employ physiological statistics, or the only formula a clinician-trialist iş ever likely to need (or understand!)", CMAJ Cilt:165 No:9 Ekim, say.1226–37 {{|pmid=11706914 |pmc=81587 |doi= |url=http://www.cmaj.ca/cgı/pmıdlookup?view=long&pmid=11706914}}(İngilizce)