Morley, J. ., Cohen, A. ., Silveira-Moriyama, L. ., Lees, A. ., Williams, D. ., Katzenschlager, R. ., … Duda, J. . Optimizing olfactory testing for the diagnosis of Parkinson’s disease: item analysis of the university of Pennsylvania smell identification test. NPJ Parkinson’s Disease, 4, 2. https://doi.org/10.1038/s41531-017-0039-8 (Original work published 2018)

Kempster, P. ., & Lees, A. . (2013). Neurology and detective writing. Practical Neurology, 13(6), 372-6. https://doi.org/10.1136/practneurol-2013-000597