G.CHEN,R.KIERZEK,I.YILDIRIM,T.R.KRUGH,D.H.TURNER, S.D.KENNEDY. STACKING EFFECTS ON LOCAL STRUCTURE IN RNA: CHANGES IN THE STRUCTURE OF TANDEM GA PAIRS WHEN FLANKING GC PAIRS ARE REPLACED BY ISOG-ISOC PAIRS. J.PHYS.CHEM.B V. 111 6718 2007 ASTM JPCBFK US ISSN 1089-5647