8Kumar S,Bhatia M,Behari M.Sleep disorders in Parkinson'sdisease.Mov Disord,2002,17:775-781.
9Pal S,Bhattacharya KF,Agapito C,et al.A study of excessive day-time sleepiness and its clinical significance in three groups of Parkin-son's disease patients taking pramipexole,cabergoline and levodopamono and combination therapy.Neural Transm,2001.108:71-77.
10Ondo WG,Dat Vuong K,Khan H,et al.Daytime sleepiness and other sleep disorder in Parkinson's disease.Neurology,2001,57:1392-1396.