Smeds, Johanna, et al. “Ductal Carcinoma in Situ of the Breast With Different Histopathological Grades and Corresponding New Breast Tumour Events: Analysis of Loss of Heterozygosity”. Acta Oncologica, vol. 44, no. 1, Feb. 2005, pp. 41-49, doi:10.1080/02841860410002842.