Electric propulsion systems for small satellites: the low earth orbit mission perseusD. Bock, G. Herdrich, M. Lau, M. Lengowski, T. Schönherr, F. Steinmetz, B. Wollenhaupt, O. Zeile and H.-P. RöserEUCASS Proceedings Series – Advances in AeroSpace Sciences, 2 (2011) 629-638DOI: https://doi.org/10.1051/eucass/201102629