Hasbullah, A.; M.Abosadiya, H.; Jumina, J.; M.Tahir, M.; Yamin, B. M. Synthesis, Structural and Antioxidant Properties of C-P-methoxyphenylcalix[4]resorcinarene. Int. J. Adv. Sci. Eng. Inf. Technol. 2013, 3, 134-137.