Douglas-Jones, A. G., Morgan, J. M., Appleton, M. A. C., Attanoos, R. L., Caslin, A., Champ, C. S., Cotter, M., Dallimore, N. S., Dawson, A., Fortt, R. W., Griffiths, A. P., Hughes, M., Kitching, P. A., O'Brien, C., Rashid, A. M., Stock, D., Verghese, A., Williams, D. W., Williams, N. W., & Williams, S. (2000). consistency in the observation of features used to classify duct carcinoma in situ (DCIS) of the breast. Journal of clinical pathology, 53(8), 596–602. http://access.bl.uk/ark:/81055/vdc_100137791730.0x000043