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2. Joint Research Centre. (2008). Particle Measurement Programme (PMP) Heavy-Duty (HD) Inter-laboratory Exercise Exploratory work at JRC (Oct 2007–Feb 2008), EUR 23426 EN, B. Giechaskiel, S. Alessandrini, F. Forni, P. Martinez-Lozano, D. Lesueur, M. Carriero, G. Martini European Commission Joint Research Centre, Institute for Environment and Sustainability, Transport and Air Quality Unit.