@misc{HasskeloMetzgerSiebertzetal.2013,
  author    = {Hakki Hasskelo and Sergej Metzger and Ingrid Siebertz and Wilfried Weidner},
  title     = {Luftqualit{\"a}t an BAB 2011},
  institution = {Abteilung Stra{\"s}enverkehrstechnik},
  type      = {workingpaper},
  year        = {2013},
}