G Wölke

Daily mortality and fine and ultrafine particles in Erfurt, Germany part I: role of particle number and particle mass.

W G Kreyling, A. Peters, H. Wichmann, 2000, Research report.

Sources and concentrations of indoor nitrogen dioxide in Hamburg (west Germany) and Erfurt (east Germany).

H. Wichmann, J. Heinrich, J. Cyrys, 2000, The Science of the total environment.