Friedrich, N. C., Torrents, E., Gibb, E. A., Sahlin, M., Sjöberg, B., & Edgell, D. R. (2007). Insertion of a homing endonuclease creates a genes-in-pieces ribonucleotide reductase that retains function. National Academy of Sciences.

Friedrich, Nancy C., Eduard Torrents, Ewan A. Gibb, Margareta Sahlin, Britt-Marie Sjöberg, und David R. Edgell. Insertion of a Homing Endonuclease Creates a Genes-in-pieces Ribonucleotide Reductase That Retains Function. National Academy of Sciences, 2007.

Friedrich, Nancy C., et al. Insertion of a Homing Endonuclease Creates a Genes-in-pieces Ribonucleotide Reductase That Retains Function. National Academy of Sciences, 2007.