Songsasen, A. and Pairgreethaves, P. (2001) “Preparation of Carbon Nanotubes by Nickel Catalyzed Decomposition of Liquefied Petroleum Gas (LPG)”, Agriculture and Natural Resources. Bangkok, Thailand, 35(3), pp. 354–359. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/240290 (accessed: 17 September 2026).