1. Denim processing technology: new heights;Paul R.;Asian Dyer,2004
2. Indigo dyeing: an ancient art;Hughey C.S.;Text. Chem. Colour.,1983
3. Denim Series – Part‐VII. The continuous indigo dyeing of cotton denim warp yarn;Paul R.;Text. Dyer Printer,1997
4. The development of indigo reduction methods and pre‐reduced indigo products