Heidari- Keshel, S.; Entezari, M.; Rezaei-Tavirani, M.; Ebrahimi, M.; Rezaei-Tavirani, M. Functionalization of MWNT-COOH by One-Step Reaction With (3-Oxoindolin-2-Ylidene) Urea and in Vitro Antitumor Study on Gastric Cancer. Gastroenterol Hepatol Bed Bench 2013, 6, Gastroenterol Hepatol Bed Bench 2013;6(Suppl.1):S39-S44.