1. Aise (1998): Annual review. Association Internationale de la Savonnerie, de la Détergence et des Produits d’Entretien. Brussels, Belgium
2. Grießhammer R, Bunke D, Gensch CO (1996): Ecological assessment of washing agents and cleaning agents — comprehensive product assessment washing and washing agents. UBA-FB 97009. Umweltbundesamt, Berlin. Freiburg
3. Hagenfors S (1999): Changes in household detergents. A statistical comparison between 1988 and 1996. Nr 9442. ISBN 91 558 6281 0. The Swedish Society for Nature Conservation. Goteborg
4. P&G Sustainability Report (1999): Embrassing the future. Using the power of innovation to improve lives, the environment and shareholder value, http://www.pg.com/99sr
5. Soljacic I, Cavara L (1999): Detergents for laundering textiles. Tekstil48: 498–504