Bažant، Zdeněk P.؛ Jia-Liang Le؛ Frank R. Greening؛ David B. Benson (27 مايو 2007). "Collapse of World Trade Center Towers: What Did and Did Not Cause It?"(PDF). Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA. 22 June 2007. Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA. Structural Engineering Report No. 07-05/C605c (page 12). مؤرشف من الأصل(PDF) في 2007-08-09. اطلع عليه بتاريخ 2007-09-17.
"2006 Metro Area Traffic Volume Index Map"(PDF). Mn/DOT. 2006. مؤرشف من الأصل(pdf) في 2016-06-11. اطلع عليه بتاريخ 2007-08-09. Index map for Mn/DOT's 2006 traffic volumes; relevant maps showing the highest river bridge traffic volumes are Maps 2E, 3E, and 3F.
"2006 Downtown Minneapolis Traffic Volumes"(PDF). Minnesota Department of Transportation. 2006. مؤرشف من الأصل(PDF) في 2016-06-11. اطلع عليه بتاريخ 2007-08-07. This map shows average daily traffic volumes for downtown Minneapolis. Trunk highway and Interstate volumes are from 2006.
"2006 Metro Area Traffic Volume Index Map"(PDF). Mn/DOT. 2006. مؤرشف من الأصل(pdf) في 2016-06-11. اطلع عليه بتاريخ 2007-08-09. Index map for Mn/DOT's 2006 traffic volumes; relevant maps showing the highest river bridge traffic volumes are Maps 2E, 3E, and 3F.
"2006 Downtown Minneapolis Traffic Volumes"(PDF). Minnesota Department of Transportation. 2006. مؤرشف من الأصل(PDF) في 2016-06-11. اطلع عليه بتاريخ 2007-08-07. This map shows average daily traffic volumes for downtown Minneapolis. Trunk highway and Interstate volumes are from 2006.
Bažant، Zdeněk P.؛ Jia-Liang Le؛ Frank R. Greening؛ David B. Benson (27 مايو 2007). "Collapse of World Trade Center Towers: What Did and Did Not Cause It?"(PDF). Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA. 22 June 2007. Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA. Structural Engineering Report No. 07-05/C605c (page 12). مؤرشف من الأصل(PDF) في 2007-08-09. اطلع عليه بتاريخ 2007-09-17.