1. Ueber Mitempfindungen und verwandte Vorgänge.;Quincke;Zeitschr. f. klin. Med.,1890
2. Pleasure, pain and sensation.;Marshall;The Philos. Review.,1892
3. The origin of pleasure and pain.;Nichols;The Philosoph. Review.,1892
4. La sensation de plaisir.;Bourdon;Rev. philos.,1893
5. On disturbances of sensation with especial reference to the pain of visceral disease.;Head;Brain.,1893