1. Arruda, L., Favier, G., Amaral, W. (1991), Proc. of the 1st European Control Conference, France, 1194–1199.
2. Bargiela, A. (1985), An algorithm for observability determination in water systems state estimation, Proc. IEE, Vol. 132, Pt. D, 6, 245–249.
3. Bargiela, A., Hainsworth, G.D. (1989), Pressure and flow uncertainty in water systems, ASCE J. Water Res. Planning and Management, 115, 2, 212–229.
4. Bargiela, A. (1994), Ellipsoid method for quantifying the uncertainty in water system state estimation, Proc. IEE Colloquium on Modelling Uncertain Systems, Vol. 1994/105, 10/1–10/3.
5. Bargiela, A., (2001) Interval and ellipsoidal uncertainty in water system state estimation, in: Granular Computing, (Pedrycz, W., ed.), Physica Verlag, 23–57.