@inproceedings{Orienti:2011XJ, author = "Orienti, Monica", title = "{Steep spectrum sources and the duty cycle of the radio emission}", doi = "10.22323/1.125.0040", booktitle = "Proceedings of 10th European VLBI Network Symposium and EVN Users Meeting: VLBI and the new generation of radio arrays {\textemdash} PoS(10th EVN Symposium)", year = 2011, volume = "125", pages = "040" }