1. Vestling, M. M., Murphy, C. M., Keller, D. A., Fenselau, C., Dedinas, J., Ladd, D. L., and Olsen, M. A. (1993) A strategy for characterisation of poly(ethylene glycol)-derivatized proteins. A mass spectrometric analysis of the attachment sites in poly(ethylene glycol)-derivatized superoxide dismutase.Drug Metab. Dispos.21, 911−917.
2. Chemistry of polyethylene glycol conjugates with biologically active molecules