Fischer; Hierneis
Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1931 , vol. 196, p. 155,158,164

Fischer; v.Holt
Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1934 , vol. 227, p. 124,132
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Fischer; Froewis
Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1931 , vol. 195, p. 49,59
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Libowitzky
Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1940 , vol. 265, p. 191,202