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Nickels, Marc R., Leanne M. Aitken, James Walsham, Adrian G. Barnett, et Steven M. McPhail. "Critical Care Cycling Study (CYCLIST) Trial Protocol: A Randomised Controlled Trial of Usual Care Plus Additional In-bed Cycling Sessions Versus Usual Care in the Critically Ill." BMJ Open 2017.

Nickels, Marc R., et al. "Critical Care Cycling Study (CYCLIST) Trial Protocol: A Randomised Controlled Trial of Usual Care Plus Additional In-bed Cycling Sessions Versus Usual Care in the Critically Ill." BMJ Open 2017.