1. Observations of cuca, or coca, the leaves of erythroxylon coca;Christison;British Medical Journal,1876
2. The coca leaf;Dowdeswell;The Lancet,1876
3. Sherlock Holmes: Short stories;Doyle, Sir Arthur Conan,1928
4. The sign of four;Doyle, Sir Arthur Conan,1928
5. Über Coca;Freud,1884