Seidel, R. A., Kahnes, M., Bauer, M., & Pohnert, G. (2015). Simultaneous determination
of the bilirubin oxidation end products Z-BOX A and Z-BOX B in human serum using liquid chromatography coupled to tandem mass
spectrometry. Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences,
974, 83-89. doi:10.1016/j.jchromb.2014.10.027.