Results of the “carbon conference” international aerosol carbon round robin test stage IHeidrun Schmid; Lothar Laskus; Hans Jürgen Abraham; Urs Baltensperger; Vincent Lavanchy; Mirko Bizjak; Peter Burba; Helene Cachier; Dale Crow; Judith Chow; Thomas Gnauk; Arja Even; H.M ten Brink; Klaus-Peter Giesen; Regina Hitzenberger; Christoph Hueglin; Willy Maenhaut; Casimiro Pio; Abel Carvalho; Jean-Philippe Putaud; Desiree Toom-Sauntry; Hans Puxbaum · 2001