H. J. Pöpel

A Dynamic Secondary Clarifier Model including Processes of Sludge Thickening

L. Härtel, H. Pöpel, L. Härtel, 1992 .

Aeration: principles and practice.

J. A. Mueller, W. Boyle, W. C. Boyle, 2002 .

Combined influence of temperature and process loading on the effluent concentration of biological treatment

H. Pöpel, H. J. Pöpel, A. Fischer, 1998 .