  
  
  [1XReferences[101X
  
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  [[20XBP92[120X]  [16XBhandari, A. K. and Passi, I. B. S.[116X, [17XLie-nilpotency indices of group
  algebras[117X, [18XBull. London Math. Soc.[118X, [19X24[119X, 1 (1992), 68--70.
  
  [[20XCoo[120X]   [16XCooperman,   G.[116X,   [17XParGAP   ---   Parallel   GAP[117X,   {GAP4}   package
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  [[20XDu92[120X]  [16XDu,  X. K.[116X, [17XThe centers of a radical ring[117X, [18XCanad. Math. Bull.[118X, [19X35[119X, 2
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