The EUVAC-NET survey: national pertussis surveillance systems in the European Union, Switzerland, Norway, and Iceland
Schmidt, J- E and Tozzi, A E and Rava, L and Glismann, S and on behalf of the EUVAC-NET country contacts, Eurosurveillance, 6, 205 (2001), https://doi.org/10.2807/esm.06.06.00205-en