W. Thomas, "The Sexual Element in Sensibility," Psychological Review, Jan., 1904.
System der gerichtlichen Psychologie, second edition, 1842, pp. 266-68; and more at length in his Allgemeine Diagnostik der psychischen Krankheiten, second edition, 1832, pp. 247-51.
Handboek van de Pathologie en Therapie der Krankzinnigheid, 1863, p. 139 of English edition.
Manuel pratique de Médecine mentale, 1892, p. 31.