Xun, P., Bujnowski, D., Liu, K., Morris, J. S., Guo, Z., & He, K. (2011). Distribution of Toenail Selenium Levels in Young Adult Caucasians and African Americans in the United States: The CARDIA Trace Element Study.

Xun, Pengcheng, Deborah Bujnowski, Kiang Liu, J. Steve Morris, Zhongqin Guo, ja Ka He. Distribution of Toenail Selenium Levels in Young Adult Caucasians and African Americans in the United States: The CARDIA Trace Element Study. 2011.

Xun, Pengcheng, et al. Distribution of Toenail Selenium Levels in Young Adult Caucasians and African Americans in the United States: The CARDIA Trace Element Study. 2011.