2021 35th International Conference on Lightning Protection (ICLP) and XVI International Symposium on Lightning Protection (SIPDA), Colombo, Sri Lanka. IEEE: pp. 1-3; ISBN 978-1-6654-2347-2
2021,
Deblieck C, Smeijers S, Morlion B, Datta A, Thomas C, Theys T
2021 5th International Conference on Electrical Information and Communication Technology (EICT), Khulna, Bangladesh. IEEE: pp. 1-6; ISBN 978-1-6654-0907-0
International Telecommunication Union (ITU),
ITU-T Recommendations K-Series, K. 91 Supplement 1 (05/2021): 1-44
2021,
Pedretti RFE, Iliou MC, Israel CW, Abreu A, Miljoen H, Corra U, Stellbrink C, Gevaert AB, Theuns DA, Piepoli MF, Reibis R, Schmid JP, Wilhelm M, Heidbuchel H, Völler H, Ambrosetti M, Deneke T, Cornelissen V, Heinzel FR, Davos CH, Kudaiberdieva G, Frederix I, Svendsen JH, Hansen D