1. Perry N, Broeders M, de Wolf C, Tomberg S, eds. European Guidelines for Quality Assurance in Mammography Screening (3rd edn.) European Commission Publication, 2001.
2. Guidelines to Cytology Procedures and Reporting in Breast Cancer Screening. NHSBSP Publication No. 22, 1993.
3. European Guidelines for Quality Assurance in the Surgical Management of Mammographically Detected Lesions;O'Higgins;Eur. J. Surg. Oncol.,1998