12. —— Ibid., 1891, 28: 197.

13. Brill. Diss. Marburg, 1861.

14. Buchheim and Eisenmenger. Beitr. Anat. Physiol., 1870, 5: 115.

15. Bunge and Schmiedeberg. Arch. Exper. Path. Pharm., 1876, 6: 233.

16. Chittenden. The Nutrition of Man, 1907.

17. Cogswell. Lancet (London), 1852, 2: 488.

18. Danilewski. Arch. Exper. Path. Pharm., 1894, 35: 105.

19. Drzewina. Compt. rend. Soc. biol., 1911, 70: 772.

20. Dumas and Pelletier. Ann. chim. phys., 1823, 24: 182.

21. Edmunds. J. Amer. Med. Assoc., 1907, 48: 1744.