Evolution of traffic flows and traffic-induced air pollution due to structural changes and development during 1993-2006 in Tartu (Estonia)Orru, Hans; Kaasik, Marko; Antov, Dago; Forsberg, BertilThe Baltic journal of road and bridge engineering2008 / 4, p. 206-216 https://www.researchgate.net/publication/245443681_Evolution_of_Traffic_Flows_and_Traffic-Induced_Air_Pollution_Due_to_Structural_Changes_and_Development_During_1993-2006_in_Tartu_Estonia