共 8 条
[1]
BADISCHE, 1906, Patent No. 174984
[2]
CASSELLA, 1923, Patent No. 376815
[3]
HOCHSTER, 1923, Patent No. 361043
[4]
JAKOB W, 1921, HELV CHIM ACTA, V4, P782
[5]
ULLMANN, 1911, Patent No. 240520
[6]
1925, HELV CHIM ACTA, V8, P155
[7]
1921, HELV CHIM ACTA, V4, P627
[8]
1921, HELV CHIM ACTA, V4, P782