1. Mohler EF, Jacob LN (1957) Anal Chem 29:1369?1374
2. Emerson E, Beacham HH, Beegle LC (1943) J Org Chem 8:417?428
3. German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H): determination of the phenol index (H 16); DIN 38409, part 16 (1984) Beuth Verlag GmbH, Berlin
4. Standard methods for the examination of water and waste water, 16th edn (1985), part 510. American Public Health Association, Washington DC
5. Recueil de normes francaises, eaux, methodes d'essais, 1st edn (1979). T90-109 Determination de l'indice ? phénol. Association Francaise de Normalisation, Paris