1
Sauer, Heinrich.
2010
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2
Cordero Otero, R. R.
2001
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3
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5
Sauer, E.
1983
6
Becks, B.
1979
JuSER
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7
Sauer, R.
1970
8
Sauer, R.
1970
9
Sauer, R.
1968
10
Sauer, R.
1967