Ewald AJ, Huebner RJ, Palsdottir H, Lee JK, Perez MJ, Jorgens DM, Tauscher AN, Cheung KJ, Werb Z, Auer M, "Mammary collective cell migration involves transient loss of epithelial features and individual cell migration within the epithelium", J Cell Sci. 2012 Jun 1;125(Pt 11):2638-54. PMC3403234.