Grayhack, J. T., Zincke, H., Paulson, D. F., McCullough, D. L., Lange, P. H., Smith, A. Y., … Lamm, D. L. (1994). Discussion. In Journal of Urology (Vol. 152, pp. 1861–1864). https://doi.org/10.1016/s0022-5347(17)32401-1

Grayhack, J. T., H. Zincke, D. F. Paulson, D. L. McCullough, P. H. Lange, A. Y. Smith, J. B. DeKernion, et al. “Discussion.” In Journal of Urology, 152:1861–64, 1994. https://doi.org/10.1016/s0022-5347(17)32401-1.

Grayhack JT, Zincke H, Paulson DF, McCullough DL, Lange PH, Smith AY, et al. Discussion. In: Journal of Urology. 1994. p. 1861–4.

Grayhack, J. T., et al. “Discussion.” Journal of Urology, vol. 152, no. 5 II, 1994, pp. 1861–64. Scopus, doi:10.1016/s0022-5347(17)32401-1.

Grayhack JT, Zincke H, Paulson DF, McCullough DL, Lange PH, Smith AY, DeKernion JB, Walsh PC, Scardino PT, Klein EA, Catalona WJ, Bagshaw M, Oesterling JE, Menon M, Trapasso J, McConnell JD, Whitmore WF, Andriole GL, Lamm DL. Discussion. Journal of Urology. 1994. p. 1861–1864.