van Beest, P. A., Hofstra, J. J., Schultz, M. J., Boerma, E. C., Spronk, P. E., & Kuiper, M. A. (2008). The incidence of low venous oxygen saturation on admission to the intensive care unit: A multi-center observational study in The Netherlands. BioMed Central.

van Beest, Paul A., Jorrit J. Hofstra, Marcus J. Schultz, E C. Boerma, Peter E. Spronk, a Michael A. Kuiper. The Incidence of Low Venous Oxygen Saturation On Admission to the Intensive Care Unit: A Multi-center Observational Study in The Netherlands. BioMed Central, 2008.

van Beest, Paul A., et al. The Incidence of Low Venous Oxygen Saturation On Admission to the Intensive Care Unit: A Multi-center Observational Study in The Netherlands. BioMed Central, 2008.