Lewis (2021. február 3.). „Determining sample size for progression criteria for pragmatic pilot RCTs: the hypothesis test strikes back!”. Pilot and Feasibility Studies7, 40. o. DOI:10.1186/s40814-021-00770-x. PMID33536076.
Lewis (2021. február 3.). „Determining sample size for progression criteria for pragmatic pilot RCTs: the hypothesis test strikes back!”. Pilot and Feasibility Studies7, 40. o. DOI:10.1186/s40814-021-00770-x. PMID33536076.