1. Technical specification 007 of National Railway Infrastructure Company, “Subsystem electrical power supply of the traction vehicles 25 kV, 50Hz. Overhead contact system. Pantographs. Mechanical interaction between pantograph and catenary”, 29.09.2006, (in Bulgarian).
2. Optimizing the process of designing and calculating railway catenary support infrastructure using a high-productivity computational tool
3. G. Kiesiewicz, T. Knych, P. Kwaśniewski, A. Rojek, “Development and testing of new solutions of overhead contact line accessories”, Problemy Kolejnictwa 60, pp. 39–50 (2016).
4. Technical Documentation of Railway Contact Network of National Railway Infrastructure Company.
5. Design and failure modes of a standard railway catenary cantilever support