Wessells, Hunter (1996). "Penile Length in the Flaccid and Erect States: Guidelines for Penile Augmentation". The Journal of Urology. 156 (3): 995–7. doi:10.1016/S0022-5347(01)65682-9. PMID8709382.
Veale, David (2015). "Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men". BJU International. 115 (6): 978–986. doi:10.1111/bju.13010. PMID25487360. S2CID36836535.
Wessells, Hunter (1996). "Penile Length in the Flaccid and Erect States: Guidelines for Penile Augmentation". The Journal of Urology. 156 (3): 995–7. doi:10.1016/S0022-5347(01)65682-9. PMID8709382.
Veale, David (2015). "Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men". BJU International. 115 (6): 978–986. doi:10.1111/bju.13010. PMID25487360. S2CID36836535.
Veale, David (2015). "Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men". BJU International. 115 (6): 978–986. doi:10.1111/bju.13010. PMID25487360. S2CID36836535.