TY - JOUR AU - M. de Kool AU - Mitchell Begelman BT - Nature DA - 4/1989 DO - 10.1038/338484a0 PY - 1989 SP - 484 EP - 485 T2 - Nature TI - Production of self-absorbed synchrotron spectra steeper than ν5/2 VL - 338 SN - 0028-0836 ER -