@misc{BeerHasskeloSiebertzetal.2011, author = {Frank Beer and Hakki Hasskelo and Ingrid Siebertz and Wilfried Weidner}, title = {Luftqualit{\"a}t an BAB 2009}, institution = {Abteilung Stra{\"s}enverkehrstechnik}, type = {workingpaper}, year = {2011}, }