[66] Pflüger’s Archiv f. Physiol., Band 22, p. 489.
[67] Ibid., Band 22, p. 479.
[68] Hoppe-Seyler’s Med. Chem. Untersuch, p. 189.
[69] Hoppe-Seyler’s Chem. Analyse, 6th auflage, p. 275.
[70] Pflüger’s Archiv f. Physiol., Band 36. p. 392.
[71] Zeitschr. f. physiol. Chem., Band 12. p. 185.
[72] Jahresbericht f. Thierchemie, Band 18, p. 219.
[73] Pflüger’s Archiv f. Physiol., Band 13, p. 469.
[74] Hoppe-Seyler’s Med. Chem. Untersuch, p. 489.
[75] Zeitschr. f. physiol. Chem., Band 7, p. 269.