Burnett, Robert W., Arthur K. Covington, Niels Fogh-Andersen, et al. "IFCC Reference Measurement Procedure for Substance Concentration Determination of Total Carbon Dioxide in Blood, Plasma or Serum" Clinical Chemistry and Laboratory Medicine, 39.3 (2005): 283-289. Retrieved 19 Jun. 2013, from doi:10.1515/cclm.2001.39.3.283

Burnett, R., Covington, A., Fogh-Andersen, N., et al. (2005). IFCC Reference Measurement Procedure for Substance Concentration Determination of Total Carbon Dioxide in Blood, Plasma or Serum. Clinical Chemistry and Laboratory Medicine, 39(3), pp. 189-289. Retrieved 19 Jun. 2013, from doi:10.1515/cclm.2001.39.3.283

Burnett, Robert W., Arthur K. Covington, Niels Fogh-Andersen, et al. 2005. IFCC Reference Measurement Procedure for Substance Concentration Determination of Total Carbon Dioxide in Blood, Plasma or Serum. Clinical Chemistry and Laboratory Medicine. 39(3): 189-289. Retrieved 19 Jun. 2013, from doi:10.1515/cclm.2001.39.3.283