Pei, Z., Bini, E. J., Yang, L., Zhou, M., Francois, F., Blaser, M. J., & Lederberg, J. (2004). Bacterial Biota in the Human Distal Esophagus. Proceedings of the National Academy of Sciences of the United States of America, 101(12), 4250-4255.

Pei, Zhiheng, Edmund J. Bini, Liying Yang, Meisheng Zhou, Fritz Francois, Martin J. Blaser, and Joshua Lederberg. "Bacterial Biota in the Human Distal Esophagus." Proceedings of the National Academy of Sciences of the United States of America 101, no. 12 (2004): 4250-4255.

Pei, Zhiheng, et al. "Bacterial Biota in the Human Distal Esophagus." Proceedings of the National Academy of Sciences of the United States of America, vol. 101, no. 12, 2004, pp. 4250-4255.