I. Litvan, Y. Agid, N. Sastrj, J. Jankovic, G. K. Wenning, C. G. Goetz, M. Verny, J. P. Brandel, K. Jellinger, K. R. Chaudhuri, A. McKee, E. C. Lai, R. K. B. Pearce, J. J. Bartko,
What are the obstacles for an accurate clinical diagnosis of Pick's disease? A clinicopathologic study Neurology. ,vol. 49, pp. 62- 69 ,(1997) ,
10.1212/WNL.49.1.62