1. The Sydney Multicentre Study of Parkinson's disease: a report on the first 3 years;Hely;J Neurol Neurosurg Psychiatry,1989
2. The Sydney multicentre study of Parkinson's disease: The first 18 months;Hely;Med J Aust,1987
3. The Sydney Multicentre Study of Parkinson's disease: a randomised, prospective five year study comparing with low dose levodopa-carbidopa;Hely;J Neurol Neurosurg Psychiatry,1994
4. Long term bromocriptine treatment in de novo parkinsonian patients;Herskovits;Medicina (B Aires),1988
5. A randomized blinded study of low-dose bromocriptine versus low-dose carbidopa/levodopa in untreated Parkinson's patients;Olanow,1987