[280] Berliner Klin. Wochenschrift, 1889 (no. 40).
[281] Encyc. der Therapie, 1896 (vol. i).
[282] Pester, Med.-Chir. Presse, 1885 (no. 39). Orvosi Hetilap, 1885 (nos. 32–33).
[283] Zeitschrift f. Klin. Med., 1893 (vol. xxiii).
[284] Mitt. aus der Würzburger Med. Klinik, 1885 (vol. 1).
[285] New York Herald, Mar. 24. 1912.
[286] Tea & Coffee Trade Jour., 1914 (vol. xxvi: pp. 537–41).
[287] The Influence of Alcohol and Other Drugs on Fatigue.
[288] "The Influence of Caffeine on Mental and Motor Efficiency." Archives of Psychology, 1912 (no. 22).
[289] Revista sper. di. Freniatria (vol. xviii: p. 1).