giao method

From: "Reynier Suardiaz del Río" <reynier.-at-.fq.uh.cu>
Subject: giao method
Date: Thu, 28 May 1998 16:21:09 +0000

  I need to know about the GIAO method' theory to calculate
 chemical shifts in NMR. Does anybody know a site or a paper or
 whatever about this theme that can help me?
  Thanks,
  Reynier.