SpringerLink (Online service), Chang, A., Schomburg, I., & Schomburg, D. (2006). Springer handbook of enzymes: Class 2 · Transferases II EC 2.1.2.1â€"2.3.1.59 (Second Edition.). Springer-Verlag Berlin Heidelberg.

SpringerLink (Online service), Antje Chang, Ida Schomburg, and Dietmar Schomburg. Springer Handbook of Enzymes: Class 2 · Transferases II EC 2.1.2.1â€"2.3.1.59. Second Edition. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2006.

SpringerLink (Online service), et al. Springer Handbook of Enzymes: Class 2 · Transferases II EC 2.1.2.1â€"2.3.1.59. Second Edition. Springer-Verlag Berlin Heidelberg, 2006.