References
- Petersen , H. 1976 . Melliand Textilberichte , 2 : 155
- US patent specification, 4.016.335 . 1977 .
- US patent specification, 6.304.880 . 1984 .
- Valk , G. and Schlieffer , K. 1969 . Anal. Chem. , 245 : 149 – 154 .
- Patent specification, DE 4142207 . 1993 .
- Patent specification, EP 565924 . 1993 .
- Patent specification, EP 604980 . 1994 .
- Patent specification, JP 07157694 . 1995 .
- Baloniak , S. and Blaszczak , H. 1983 . Acta Pol. Pharm. , 40 ( 2 ) : 249 – 50 .