1. Anliker R (1975) In: Coulston F, Korte F (eds) Anliker R, Müller G (guest eds) (1975) Fluorescent whitening agents; EQS environmental quality and safety, supp vol 4, Thieme, Stuttgart p 12
2. Procter and Gamble Company (1990) product information
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4. Burg AW, Rohovsky MW, Kensler CJ (1977) CRC Crit Rev Env Contr 7:91
5. Coulston F, Korte F (eds) Anliker R, Müller G (guest eds) (1975) Fluorescent whitening agents; EQS environmental quality and safety, supp vol 4, Thieme, Stuttgart