1. Cole, J. Donor Area Harvesting Body to Scalp. In: W.P. Unger and R. Shapiro , eds. Hair Transplantation , 5th Ed. London: Informa Healthcare, 2011; pp. 304-305.
2. Yu, J.M. , and A.Y. Yu . Donor Area Harvesting Beard to Scalp. In: W.P. Unger and R. Shapiro , eds. Hair Transplantation , 5th Ed. London: Informa Healthcare, 2011; pp. 300-302.
3. Unger, W.P. Why Mixed Grafting: Follicular Units and Multi-Follicular Unit Grafts. Hair Transplantation , 4th Ed. New York: Marcel Decker, 2004; p. 477.
4. Ibid. p. 488.
5. Shapiro, R. Principles of creating a natural hairline. In: W.P. Unger , ed. Hair Transplantation, 5th Ed. London: Informa Healthcare, 2011; pp. 373-382.