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  1. By: Beck, Erwin, - Rehder, H. (Helmut), - Schulze, E.-D. (Ernst-Detlef),
    Type: Article
    In: Journal of the East Africa Natural History Society and National Museum
    Volume: 76
    Date: 1987
    Page Range: 1--12
    Publication Info: [Nairobi, Kenya], The Society, [1965]-1993
  2. By: Beck, Erwin, - Rehder, H. (Helmut), - Pongratz, P.
    Type: Article
    In: Journal of The East Africa Natural History Society and National Museum
    Date: 1981
    Page Range: 1-11
  3. By: Zwölfer, Helmut - Böheim, Marc - Beck, Erwin,
    Type: Article
    In: Journal of Hymenoptera Research
    Volume: 42
    Date: 2015
    Page Range: 47-62
    Publication Info: Pensoft Publishers 2015
  4. By: Rehder, H. (Helmut), - Beck, Erwin, - Kokwaro, J. O.
    Type: Article
    In: Journal of The East Africa Natural History Society and National Museum
    Date: 1981
    Page Range: 1-7