Diagnosis and Management of Hormone-Secreting Pituitary AdenomasNEJM 324:822-831, Klibanski,A.&Zervas,N.T., 1991
Parkinsons DiseaseLancet 373:2055-2066, Lees,A.J.,et al, 2009
Parkinson's DiseaseJNNP 57:672-681, Marsden,C.D., 1994