1. A clinical disability rating for Parkinson patients;Alba;J Chronic Dis,1968
2. Practical Statistics for Medical Research;Altman,1991
3. Oral L‐dopa treatment of parkinsonism;Andén;Acta Med Scand,1970
4. Appendix: available dyskinesias clinical rating scales;Anonimous;Mov Disord,1999
5. La medida de la salud;Badía,1999