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4. Bakker MCM. Web crippling of cold-formed steel members. Ph.D. thesis, Technische Universiteit Eindhoven, Department of Architecture, Building and Planning, Structural Design Group, 2000, ISBN 90-386-0122-0. Available at: 〈http://alexandria.tue.nl/extra3/proefschrift/PRF8B/9206097.pdf〉.
5. Theoretical and experimental research on web crippling of cold-formed flexural steel members;Bakker;Thin Walled Struct,1994