Horrion, J., & Sonveaux, E. (1984). Gel-permeation Chromatography of Alkali Cations in Methanol Effect of Macromolecular Ligands On the Volume of Elution. Societes Chimiques Belges. Bulletin, 93(5), 347-353. https://doi.org/10.1002/bscb.19840930502 (Original work published 1984)