1. RFCS: Research Programme of the Research Fund for Coal and Steel - Technical Group TG 8: “Execution and Reliability of slip-resistant connections for steel structures using CS and SS” (SIROCO). Project Coordinator: Prof. N. Stranghöner Universität Duisburg-Essen 2014
2. Z-14.4-591: Allgemeine bauaufsichtliche Zulassung (abZ): Schließringbolzen ohne Abrissteil Deutsches Institut für Bautechnik Berlin 2016
3. ISO 898-1:2013-05: Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread
4. DVS-EFB 3435-2:2016-05: Lockbolt systems - calculation of connections according to Eurocode 3 and VDI 2230-Part 1, Translation of May 2016 German edition
5. Bemessung und Ausführung von Verbindungen mit Schließringbolzen im Stahlbau;Glienke;Stahlbau,2015