Primary byline W. G. Zijlstra, A. Buursma and W. P. Meeuwsen-van der Roest. Clinical Chemistry 37(9), 1633–1638 (1991), DOI doi.org/10.1093/clinchem/37.9.1633 . Abstract: measured millimolar absorptivities for four fetal/adult human hemoglobin derivatives over 450–1000 nm; small fetal/adult spectral differences matter to multicomponent analysis. No full-name expansion inferred from initials.