A fuzzy controller for activated sludge waste water plants. - Jens Alex; Ulrich Jumar; R. Tschepetzki (AIRTC, 1994)

Dynamische Simulation komplexer Abwasserreinigungsprozesse. - Jens Alex; R. Tschepetzki (GI Jahrestagung, 1994)

An empirical observer for wastewater treatment plants. - Jens Alex; Ulrich Jumar; R. Tschepetzki (ECC, 1999)