参考文献

Charubala, Ramamurthy; Maurinsh, Juris; Roesier, Angelika; Melguizo, Manuel; Jungmann, Oliver; Gottlieb, Margarete; Lehbauer, Joerg; Hawkins, Mary; Pfleiderer, Wolfgang Nucleosides and Nucleotides, 1997 , vol. 16, # 7-9 p. 1369 - 1378