Comprehensive heterocyclic chemistry III:a review of the literature 1995-2007:Vol 9 six-membered rings with three or more heteroatom, and their fused carbocyclic derivatives - Katritzky, Alan R; Ramsden, Christopher A; Turnbull, Kenneth (Amsterdam Elsevier, 2008)
Library has its all fifteen volumes. (Ref. sec)
Keywords: FUSED SYSTEMS; HETEROCYCLIC RING; HETEROCYCLIC-CHEMISTRY