Knecht, W., Sandrini, M. P., Johansson, K., Eklund, H., Munch-Petersen, B., & Piškur, J. (2002). A few amino acid substitutions can convert deoxyribonucleoside kinase specificity from pyrimidines to purines. Oxford University Press.

Knecht, Wolfgang, Michael P.B Sandrini, Kenth Johansson, Hans Eklund, Birgitte Munch-Petersen, and Jure Piškur. A Few Amino Acid Substitutions Can Convert Deoxyribonucleoside Kinase Specificity From Pyrimidines to Purines. Oxford University Press, 2002.

Knecht, Wolfgang, et al. A Few Amino Acid Substitutions Can Convert Deoxyribonucleoside Kinase Specificity From Pyrimidines to Purines. Oxford University Press, 2002.