1. Measuring the quality of life of patients with Parkinson's disease;Shindler, J.S.; Brown, R.G.; Welburn, P.; Parkes, J.D.,1988
2. A prospective longitudinal study of depression, cognitive decline and physical impairment in patients with Parkinson's disease;Starkstein, S.E.; Mayberg, H.S.; Leiguarda, R.; Preziosi, T.J.; Robinson, R.G.;7 Neurol Neumosurg Psychiatny,1990
3. Assessment of quality of life in Parkinson's disease;Welburn, P.; Walker, S.,1988
4. Parkinsonism: onset, progression and mortality;Neurology,1967
5. Evaluating the evaluations: or how to weigh the scales of parkinsonian disability;Diamond, S.G.; Markham, C.H.;Neurology,1983