Zhao, Zhixin, Ogunsipe, Abimbola O, Maree, M David, Nyokong, Tebello. World Scientific Publishing; 2005. Synthesis and photophysical properties of a covalently linked porphyrin-phthalocyanine conjugate.

Tau, Prudence, Ogunsipe, Abimbola O, Maree, Suzanne, Maree, M David, Nyokong, Tebello. World Scientific Publishing; 2003. Influence of cyclodextrins on the fluorescence, photostability and singlet oxygen quantum yields of zinc phthalocyanine and naphthalocyanine complexes.