• <ref>Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7, Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-9) VOLUMES 1 and 2</ref><sub>, Seite 593 ff.</sub> | • <ref>Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7, Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-9) VOLUMES 1 and 2</ref><sub>, Seite 593 ff.</sub> |