2NAKANO SHINJI, DAIMON EMIKO. 2,2'-Bis (6-benzotriazolylphnol)compounds, their use as ultraviolet absorbers and copolymers containing them. WO 98-50 371,1998-11-12.
3FUKUOKA NAOHIKO. 1,4-Bis (2H-benzotriazolyl) piperazine, their manufacture, and UV absorbents for polymers. JP 2001 278 869,2001-10-10.
6WERNER STEGMANN, RETO LUISOLI. Process for the preparation of liquid mixtures of alkylated 2-(2-Hydroxyphenyl ) benzotriazoles. USP 4921966,1990-05-01.
7ROLAND A E WINTER, ROBERT E DETLEFSEN. Liquid 2-(2-hydroxy-3-higher branched alkyl-5-methyl-phenyl)- 2H-benzotriazole mixitures,stabilized compositions and pgocesses for preparaing liquid mixtures. USP 4675552, 1987-06-23.
8ROLAND A E WINTER, ROBERT E DETLEFSEN. Liquid substituted 2 H benzotriazole mixtures, Stabihzed compostions and processes for preparaing the liquid mixtures. USP 4973701,1990-11-27.