
 |
Dupré, Judith Skyscrapers (2nd edition), Black Dog & Leventhal Publishers, Inc., New York (USA) , ISBN 1579127878, 2008; pp. 140-141.
|
 |
Tomasetti, Richard Structural Engineering of the 600m Chicago Spire, presented at 17tth IABSE Congress, Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, September 17-19, 2008.
|
 |
Walton, William Geotechnical Engineering of the 600m Chicago Spire, presented at 17tth IABSE Congress, Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, September 17-19, 2008.
|
|