Comparison of electrical and microstructural property of polyaniline-poly-ortho-anisidine (PAni-PAnis) copolymer with its homopolymers - Battung, Rosalie B.; Formento, Abel P.; Sarmago, Roland V.; Amada, Maricon R.; Del Rosario, Ernesto J.; Tamayo, Jelynne P.; Basilia, Blessie A. (Proceedings of the 23rd Samahang Pisika ng Pilipinas Physics Congress, 2005)