Bulian, D. R., Knuth, J., Cerasani, N., Sauerwald, A., Lefering, R., & Heiss, M. M. (2015). Transvaginal/Transumbilical Hybrid—NOTES—Versus 3-Trocar Needlescopic Cholecystectomy: Short-term Results of a Randomized Clinical Trial. Ann Surg.

Bulian, Dirk Rolf, Jürgen Knuth, Nicola Cerasani, Axel Sauerwald, Rolf Lefering, und Markus Maria Heiss. "Transvaginal/Transumbilical Hybrid—NOTES—Versus 3-Trocar Needlescopic Cholecystectomy: Short-term Results of a Randomized Clinical Trial." Ann Surg 2015.

Bulian, Dirk Rolf, et al. "Transvaginal/Transumbilical Hybrid—NOTES—Versus 3-Trocar Needlescopic Cholecystectomy: Short-term Results of a Randomized Clinical Trial." Ann Surg 2015.