Variable expression of Parkinson's diseaseJoseph Jankovic, William C. Koller, C. Warren Olanow et al.|Neurology|1990Cited by 1.3k
Olfactory function in essential tremorKaren Busenbark, William C. Koller, S. J. Huber et al.|Neurology|1992Cited by 90
Clinical experience with controlled‐release carbidopa/levodopa in Parkinson's diseaseRajesh Pahwa, William C. Koller, Karen Busenbark et al.|Neurology|1993Cited by 61
Tremor disorders of aging: diagnosis and management.William C. Koller, S. J. Huber|PubMed|1989Cited by 31