1. Clinical Trials: A Methodologic Perspective;Piantadosi,2005
2. Principles and Practice of Clinical Trial Medicine;Chin,2008
3. Cross-over Trials in Clinical Research;Senn,2002
4. Lesson 15: Crossover Designs. Accessed 25 December 2021. https://online.stat.psu.edu/stat509/book/export/html/749.
5. Design and Analysis of Cross-Over Trials;Jones,2005