1. Adamsson, J. (1997) - The Swedish experience and viewpoints,IWSA Workshop on Performance Indicators for Transmission and Distribution Systems, Lisbon, Portugal.
2. Alegre, H. (1997) - Performance indicators - current trends, workshop “Public-private partnership for African Water Utilities”, Water Utility Partnership, World Bank, Kampala, Uganda.
3. Alegre, H.; BAPTISTA, J. M. (1997) - Indicadores de desempenho de sistemas de distribuiçâo de âgua: uma questâo de modo ou de necessidade?, “Revista Indtstria da Agua”, No. 25 ( Oct./Nov./Dez. 1997 ), EPAL, Lisboa.
4. Alegre, H. Hirner, W., Baptista, J. M. Cubillo F. (1997) - Proposal for basic and performance indicators for water supply,2nd draft, September 1997, IWSA Operations and Maintenance Committee, Task Force 8 - “Performance Indicators”, Lisbon, Portugal.
5. Alegre H. Baptista, J. M., Faria A. L. (1997) - A general framework of performance indicators in the scope of water supply,IWSA Workshop on Performance Indicators for Transmission and Distribution Systems, Lisbon, Portugal.