Daroff, Robert B.; Fenichel, Gerald M.; Jankovic, Joseph; Mazziotta, John C. Chapter 37. Neurology in Clinical Practice. Elsevier Health Sciences. 2012-03-29: 3022 [2018-03-19]. ISBN 978-1-4557-2807-7. (原始内容存档于2022-10-14) (英语).
Daroff, Robert B.; Fenichel, Gerald M.; Jankovic, Joseph; Mazziotta, John C. Chapter 37. Neurology in Clinical Practice. Elsevier Health Sciences. 2012-03-29: 3022 [2018-03-19]. ISBN 978-1-4557-2807-7. (原始内容存档于2022-10-14) (英语).