1. Tappi Test Methods, TAPPI Press, Atlanta, 1992, T 624 cm-85.
2. Tappi Test Methods, TAPPI Press, Atlanta, 1992, T 625 cm-85.
3. Ion-pair chromatographic separation of inorganic sulphur anions including polysulphide
4. Tappi Test Methods, TAPPI Press, Atlanta, 1992, T 699 om-87.