1
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11
by Goetz, B., Koeniger, N.
Published in Apidologie (1992)
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12
13
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15
by Sakofski, F., Koeniger, N., Fuchs, S.
Published in Apidologie (1990)
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18
by Koeniger, N., Hemmling, C., Yoshida, T.
Published in Apidologie (1989)
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20
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