Williams, A., & ,. (1993). Probing the structure of the conduction pathway of the sheep cardiac sarcoplasmic reticulum calcium-release channel with permeant and impermeant organic cations. The Journal of General Physiology, 102(6), pp. 1107-1129. doi:10.1085/jgp.102.6.1107

Williams, Alan, and. "Probing the Structure of the Conduction Pathway of the Sheep Cardiac Sarcoplasmic Reticulum Calcium-release Channel With Permeant and Impermeant Organic Cations." The Journal of General Physiology 102, no. 6 (1993): 1107-1129.

Williams, Alan, and. "Probing the Structure of the Conduction Pathway of the Sheep Cardiac Sarcoplasmic Reticulum Calcium-release Channel With Permeant and Impermeant Organic Cations." The Journal of General Physiology 102.6 (1993): 1107-1129.