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Birkett, Stefan T., Amy E. Harwood, Edward Caldow, Saïd Ibeggazene, Lee Ingle, και Sean Pymer. "A Systematic Review of Exercise Testing in Patients With Intermittent Claudication: A Focus On Test Standardisation and Reporting Quality in Randomised Controlled Trials of Exercise Interventions." PLoS One 2021.

Birkett, Stefan T., et al. "A Systematic Review of Exercise Testing in Patients With Intermittent Claudication: A Focus On Test Standardisation and Reporting Quality in Randomised Controlled Trials of Exercise Interventions." PLoS One 2021.