TY - CPAPER AU - B. Stern AU - Marek Sikora AU - R. Svensson CY - College Park, Maryland (USA) DO - 10.1063/1.42202 PB - AIP PP - College Park, Maryland (USA) PY - 1992 TI - Pair cascades triggered by relativistic protons in AGNs UR - http://link.aip.org/link/APCPCS/v254/i1/p313/s1\&Agg=doi ER -