R. D. Pezner, M. P. Patterson, L. R. Hill, N. L. Vora, K. R. Desai, and J. A. Lipsett, “Multiple variable analysis of factors responsible for cosmetic retraction in patients treated conservatively for stage I or II breast carcinoma”, AO, vol. 24, no. 4, pp. 327–330, Jan. 1985.