1. P. A. Levene u. F. Medigreceanu, Journ. of biol. Chemistry 9, 389 [1911].
2. W. Jones, Journ. of biol. Chemistry 12, 31 [1912].
3. S. Amberg u. W. Jones, Zeitschr. f. Physiol. Chemie 73, 407 [1911].
4. W. Jones, Jonrn. of boil. Chemistry 9, 129, 169 [1911].
5. P. A. Levene u. F. Medigreeeanu, Journ. of biol. Chem. 9, 389 [1911].