TY - JOUR AU - Mitchell Begelman AU - M. Rees AU - Marek Sikora BT - The Astrophysical Journal DA - 07/1994 DO - 10.1086/187412 PY - 1994 EP - L57 T2 - The Astrophysical Journal TI - Energetic and radiative constraints on highly relativistic jets UR - http://articles.adsabs.harvard.edu/full/1994ApJ...429L..57B VL - 429 SN - 0004-637X ER -