Pérez Méndez S, Blanco González E, Sanz-Medel A
Department of Physical and Analytical Chemistry, University of Oviedo, C/ Julián Clavería, 8, 33006-Oviedo, Spain.
Biomed Chromatogr. 2000 Feb;14(1):8-9. doi: 10.1002/(SICI)1099-0801(200002)14:1<8::AID-BMC946>3.0.CO;2-W.