Caroline M. Tanner, Biao Chen, Wen-Zhi Wang, Man-Ling Peng, Zho-Lin Liu, Xue-Ling Liang, Li Chiung Kao, David W. Gilley, Bruce S. Schoenberg,
Environmental factors in the etiology of Parkinson's disease. Canadian Journal of Neurological Sciences. ,vol. 14, pp. 419- 423 ,(1987) ,
10.1017/S0317167100037835