Analysis of the usefulness of biological parameters for the control of activated sludge wastewater treatment plants in an interlaboratory study context

1. Arregui, L.
2. Liébana, R.
3. Rodríguez, E.
4. Murciano, A.
5. Conejero, F.
6. Pérez-Uz, B.
7. Serrano, S.