1. Copper enzymes in isolated chloroplast, polyphenol oxidase in Beta vulgaris;Arnon;Plant Physiol.,1949
2. Plankton pigment monograph;Duxbury;J. Mar. Res.,1956
3. Fly ash as a soil ameliorant for improving crop production – a review;Jala;Bioresour. Technol.,2006
4. Kalra, Y.P., Maynard, D.G., 1991. Methods manual for forest soil and plant analysis. Forestry Canada, Northwest Region, Northern forest Centre, Edmonton, Alberta, Information Report NOR-X-319.
5. Carotenoids Antioxidants in Higher Plants;Kenneth,2000