Enzymic Synthesis, Characterisation and Nuclear‐Magnetic‐Resonance Spectra of pppA2′p5′A2′p5′A and Related Oligonucleotides: Comparison with Chemically Synthesised MaterialE. M. Martin, Ian M. Kerr, N.J.M. Birdsall et al.|European Journal of Biochemistry|1979Cited by 101