Ouyang, Y., Karim, M. E., Gustafson, P., Field, T. S., & Wong, H. (2020). Explaining the variation in the attained power of a stepped-wedge trial with unequal cluster sizes. BMC Med Res Methodol.

Ouyang, Yongdong, Mohammad Ehsanul Karim, Paul Gustafson, Thalia S. Field, a Hubert Wong. "Explaining the Variation in the Attained Power of a Stepped-wedge Trial With Unequal Cluster Sizes." BMC Med Res Methodol 2020.

Ouyang, Yongdong, et al. "Explaining the Variation in the Attained Power of a Stepped-wedge Trial With Unequal Cluster Sizes." BMC Med Res Methodol 2020.