References
Skene, Simon S., and Michael G. Kenward. “The Analysis of Very Small Samples of Repeated Measurements I: An Adjusted Sandwich Estimator.” Statistics in Medicine 29, no. 27 (November 2010): 2825–37. https://doi.org/10.1002/sim.4073.
———. “The Analysis of Very Small Samples of Repeated Measurements II: A Modified Box Correction.” Statistics in Medicine 29, no. 27 (November 2010): 2838–56. https://onlinelibrary.wiley.com/doi/10.1002/sim.4072.