Al-Raqa, Shaya Y.; Messali, Mouslim; Al-Refae, Saleem; Ghanem, Badr S.; Moussa, Ziad; Ahmed, Saleh; El-Khouly, Mohamed E.; Fukuzumi, Shunichi Dyes and Pigments, 2011 , vol. 91, # 2 p. 231 - 236