TY - JOUR AU - P. Schneider AU - J. Kirk BT - The Astrophysical Journal DA - Jan-12-1987 DO - 10.1086/185063 PY - 1987 EP - L87 T2 - The Astrophysical Journal TI - Fermi acceleration at shocks with arbitrary velocity profiles UR - http://articles.adsabs.harvard.edu/full/1987ApJ...323L..87S VL - 323 SN - 0004-637X ER -