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- [2] WILLGERODT, BER DTSCH CHEM GES, V25, P3494
- [3] 1893, BER DTSCH CHEM GES, V26, P360
- [4] 1899, Z ANORG CHEM, V20, P30
- [5] 1892, BER DTSCH CHEM GES, V25, P3499
- [6] 1871, CHEM NEWS, V24, P291
- [7] 1901, BER DTSCH CHEM GES, V34, P2631
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- [9] 1900, BER DTSCH CHEM GES, V33, P573