References
- Brooks BR, Sanjak M, Belden D, Waclawik A. Motor neurone disease: basic designs, sample sizes and pitfalls. In: RJ Guiloff, ed. Clinical Trials in Neurology. London: Springer- Verlag, 2001: 427–445.
- Feinstein AR. Clinimetrics. New Haven, CT: Yale University Press, 1987.
- Guiloff RJ, Goonetilleke A. Motor neurone disease: ethics, outcome variables and clinical scales. In: RJ Guiloff, ed. Clinical Trials in Neurology. London: Springer-Verlag, 2001: 403–425.
- Hobart JC, Thompson AJ. Assessment Measures and Clinical scales. In: RJ Guiloff, ed. Clinical Trials in Neurology. London: Springer-Verlag, 2001: 17–28.
- Munsat TL (ed.). Quantification of Neurological Deficit. Boston: Butterworth, 1989.