Thierfelder Hoppe-Seyler's Zeitschrift fuer Physiologische Chemie, 1887 , vol. 11, p. 391 Full Text Show Details Reichstein; Oppenauer Helvetica Chimica Acta, 1933 , vol. 16, p. 988,997 Helvetica Chimica Acta, 1934 , vol. 17, p. 390,392