“La valutazione d'impatto ambientale: metodologie, esperienze e professionalità” (Bologna, 1995), "Analisi e valutazione dell'inquinamento atmosferico a scala locale", (Maffeis);

“Inquinanti atmosferici primari e secondari” (Milano, 1996), "Contributo del traffico autoveicolare all’inquinamento della città di Lecco” (Gagliano, Geraci, Maffeis, Pozzi, Sala, Tamponi);

“4th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Ostenda - Belgio, 1996), "Results of sensitivity analysis of some methods to evaluate scaling parameters” (Longoni, Bellasio, Bianconi, Lanzani, Maffeis, Tamponi);

“Transport and Air Pollution” (Avignone - Francia, 1997), "Present and future regulated and unregulated exhaust emissions scenarios for vehicles traffic in Lombardy Region” (De Martini, Salvi, Maffeis, Tamponi);

“Transport and Chemical Transformation in the Troposphere”, (Garmisch – Germania, 1998), “Estimate of biogenic emissions in the Lombardy Region” (Longoni, Maffeis);
“5th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Rodi - Grecia, 1998), "Development of a modelling environment in Aurora” (Quaranta, Casati, Macalli, De Martini, Longoni, Maffeis, Tamponi);

“5th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Rodi - Grecia, 1998), "A methodology to estimate NMVOC biogenic emissions: sensitivity analysis and first application in Lombardy area” (Longoni, Maffeis);

"23rd NATO/CCMS International Technical Meeting on Air Pollution Modeling and Its Application" (Varna – Bulgaria, 1998) “Modelling photochemical smog episodes in Lombardy Region” (De Martini, Pasi, Maffeis, Longoni, Tamponi, Graziani, Lanzani);

“Ossidanti fotochimici e Aerosol in Regione Lombardia” (Milano, 1999) “Stima delle emissioni dei precursori dell'ozono durante la campagna PIPAPO” (Maffeis, Longoni, De Martini e Tamponi);

“Ossidanti fotochimici e Aerosol in Regione Lombardia” (Milano, 1999) “Il contributo della modellazione" (De Martini, Zabot Longoni, Maffeis, Toscani, Cattaneo, Tamponi).

"24th NATO/CCMS International Technical Meeting on Air Pollution Modeling and Its Application" (Boulder – Colorado, 2000) “Photochemical modelling of a wintertime episode and HONO's role” (Ghezzi, Maffeis, Febo, Tamponi);

“7th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Belgirate - Italia, 2001), "Meteorological nowcasting for an environmental emergency decision support system” (Longoni, Maffeis, De Martini, Quaranta);

“7th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Belgirate - Italia, 2001), "A model approach in risk assessment. A case study in the industrial area of Porto Marghera, Venice” (Benassi, Liguori, Maffeis, Susanetti).

"25th NATO/CCMS International Technical Meeting on Air Pollution Modeling and Its Application" (Louvain – Belgio, 2001) “New Algorithms for the Determination of Solar Radiation, Surface Temperature and PBL Height in CALMET” (Maffeis, Bellasio, Scire, Longoni, Bianconi, Quaranta).

XXV Riunione Annuale della Associazione Italiana di Epidemiologia – “Epidemiologia ed ambiente: dalla identificazione al controllo dei rischi ambientali” (Venezia, 2001) “Stima delle ricadute industriali di acrilonitrile e CVM nell’area veneziana” (Benassi, Liguori, Lorenzet, Maffeis, Susanetti, Pillon).

“La valutazione del materiale particellare alla luce del DM 2/4/2002” – (Carrara, 2002) "Le emissioni di PM10 in Lombardia e nelle aree critiche: il ruolo del traffico veicolare" (Caserini, Fraccaroli, Giudici, Maffeis).

“9th Workshop on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes” (Garmisch - Germania, 2004), "Model simulation of Venezia-Mestre ring road pollution: Experimental check and model intercomparison” (Rosa, Biancotto, De Lorenzo, Formenton, Liguori, Lorenzet, Maffeis, Pillon, Pistollato, Tarabotti)

“6th International Conference on Emission Monitoring - CEM” (Milano, 2004), "Lombardy emission inventory in City Delta Framework” (Maffeis)

“Inventari locali di emissione in atmosfera: strumenti ed esperienze” (Venezia, 2004) “Primo approccio ad un inventario regionale – Stima preliminare delle emissioni in atmosfera nella Regione Veneto secondo l’approccio top-down integrato da un approccio bottom-up” (Benassi, Gnocchi, Maffeis, Lorenzet, Malvasi, Susanetti).

“TFEIP/EIONET Meeting and Workshops”, (Pallanza, Italia, 2004), “City emissions: similarities and differences, focusing on PM” (Maffeis, Longoni, Bossi, Thunis, Cuvelier)

5th Conference on Urban Air Quality, (Valencia, Spain, 2005), “The lagoon influence on the atmospheric dispersion in Venice” (Dalan, Benassi, Maffeis, Pillon)

5th Conference on Urban Air Quality, (Valencia, Spain, 2005), Applicazione di CALPUFF e CALINE in area urbana, confronto tra diversi approcci modellistici (Pertot, Maffeis, A. Tanzanella, M. Bedogni)

“1st international conference on Harbours and Air Quality”, (Genova, Italia, 2005), “Validation, sensitivity and source appointment analysis of CAMx model over the Veneto Region and Venice Lagoon” (Maffeis, Pillon, Dalan, Liguori, Benassi).

“1st international conference on Harbours and Air Quality”, (Genova, Italia, 2005), “An integrated top-down and bottom-up approach to estimate atmospheric emissions in the Venice Lagoon” (Gnocchi, Maffeis, Malvasi, Susanetti, Lorenzet, Benassi).

"28th NATO/CCMS International Technical Meeting on Air Pollution Modeling and Its Application" (Leipzig - Germania, 2006) Costa M. P., Alessandrini S., Bedogni M., Bessagnet B., Bossi E., Maffeis G., Pertot C., Pirovano G., Vautard R. “Long term evaluation of secondary atmospheric pollution over Italy”