S. ARULARASI and T. SOMANATHAN 2017. Helical double and triple walled carbon nanotubes from combustion catalyst by chemical vapour deposition techniques. International Journal of Pharma and Bio Sciences. 8, 1 (Mar. 2017), 69–74. DOI:https://doi.org/10.22376/ijpbs.2017.8.1. p69-74.