Mark Mascal; Nema Hafezi; Nabin K. Meher & James C. Fettinger (2008). "Oxatriquinane and Oxatriquinacene: Extraordinary Oxonium Ions". Journal of the American Chemical Society. 130 (41): 13532–13533. doi:10.1021/ja805686u. PMID18798616.
Mark Mascal; Nema Hafezi; Nabin K. Meher & James C. Fettinger (2008). "Oxatriquinane and Oxatriquinacene: Extraordinary Oxonium Ions". Journal of the American Chemical Society. 130 (41): 13532–13533. doi:10.1021/ja805686u. PMID18798616.