1. DASt-Richtlinie 016:1992-Bemessung und konstruktive Gestaltung von Tragwerken aus dünnwandigen kaltgeformten Bauteilen. (in German)
2. EN 1993-1-3:2006 Eurocode 3-Design of steel structures-Part 1-3: General rules-Supplementary rules for coldformed members and sheeting.
3. ENV 1993-1-3:1996 Eurocode 3-Design of steel structures-Part 1-3: General rules-Supplementary rules for coldformed members and sheeting.
4. Gajdzicki, M. (2011). Numerical simulation to determine torsional restraint of cold-formed Z-purlin. (in Polish). Ph.D. thesis. Lodz University of Technology, Poland.
5. Gajdzicki, M., Goczek, J. (2015). “Numerical determination of rotational restraint of cold-formed Z-purlin according to EC3.” International Journal of Steel Structures, 15, pp. 633–645.