[974] Barbagallo, loc. cit.

[975] Heller, loc. cit.

[976] Still, Brit. Med. Journ., 1899.

[977] Dornblüth, loc. cit.

[978] Rahn, Münch. med. Wochenschr., 1905.

[979] Senger, Berl. klin. Wochenschr., 1907, xxxviii.

[980] Seifert, Deutsch. med. Zeitg., 1885.

[981] Esser, Schweiz. Korrespondenzbl., 1893.

[982] Jurasz, Heymann’s “Handb. d. Laryng. u. Rhinol.,” 1899, ii.

[983] Cortial, Union méd., 1886.