Alex Schwarzenberg-Czerny (CAMK)
Michał Bejger (CAMK)
based on arXiv:0705.1011
Krzysztof Bolejko (CAMK)
Radek Smolec (CAMK)
Jarek Klimentowski (CAMK)
Szymon Starczewski (CAMK)
based on arXiv:0708.3890
Michał Różyczka (CAMK)
based on astro-ph 07090545 by Mitchell Begelman
Odele Straub (CAMK)
based on Science, 317 (2007), 1527.