F.HAN,W.WATT,D.J.DUCHAMP,L.CALLAHAN,F.J.KEZDY, K.AGARWAL. MOLECULAR STRUCTURE OF DEOXYCYTIDYL-3'-METHYLPHOSPHONATE (RP) 5'-DEOXYGUANIDINE, D[CP(CH3)G]. A NEUTRAL DINUCLEOTIDE WITH WATSON-CRICK BASE PAIRING AND A RIGHT HANDED HELICAL TWIST. NUCLEIC ACIDS RES. V. 18 2759 1990 ASTM NARHAD UK ISSN 0305-1048