Long-range response to transmission line disturbances in DC electricity grids Darka Labavić, Raluca Suciu, Hildegard Meyer-Ortmanns and Stefan Kettemann Eur. Phys. J. Special Topics, 223 12 (2014) 2517-2525 Published online: 26 September 2014 DOI: 10.1140/epjst/e2014-02273-0