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[1]
HINKEL, 1934, SOC, P283
[2]
KUHN R, 1934, KALLSCHMITT, V67, P1452
[3]
1891, J PR, V43, P257
[4]
1934, L MITTEIL HELV, V17, P1165
[5]
1934, HELV CHIM ACTA, V17, P1011
[6]
1934, HELV CHIM ACTA, V17, P1010