C. S. Keator, Lindner, J. R., J. Belcik, T., Bishop, C., and Slayden, O. D.,
“Contrast-enhanced ultrasound reveals real-time spatial changes in vascular perfusion during early implantation in the macaque uterus”,
Fertility and Sterility, vol. 95, no. 4, pp. 1316 - 1321.e3, 2011.