Hoering
Chemische Berichte, 1904 , vol. 37, p. 1548
Chemische Berichte, 1905 , vol. 38, p. 3460

Hoering
Chemische Berichte, 1904 , vol. 37, p. 1548
Chemische Berichte, 1905 , vol. 38, p. 3460

Pond; Erb; Ford
Journal of the American Chemical Society, 1902 , vol. 24, p. 345
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Hell; Hollenberg
Chemische Berichte, 1896 , vol. 29, p. 687
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Hell; v. Guenthert
Journal fuer Praktische Chemie (Leipzig), 1895 , vol. <2> 52, p. 199