By Nagelkerke Leo A.J.   Sibbing Ferdinand A.   in Netherlands Journal of Zoology

ISSN:1568-542X|50|2|179-214

Brill‎(2000)‎

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By Dejen Eshete   Vijverberg Jacobus   Nagelkerke Leo A.J.   Sibbing Ferdinand A.   in Hydrobiologia

ISSN:0018-8158|513|1-3|39-49

Springer Publishing Company ‎(2004)‎

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By Nagelkerke Leo A.J.   Sibbing Ferdinand A.   Osse Jan W.M.   in Netherlands Journal of Zoology

ISSN:1568-542X|45|3-4|431-454

Brill‎(1994)‎

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