Gregório, T., Rüdiger, A. L., Nunes, G. G., Soares, J. F., & Hughes, D. L. (2015). Crystal structure of an eight-coordinate terbium(III) ion chelated by N,N′-bis­(2-hy­droxy­benz­yl)-N,N′-bis­(pyridin-2-ylmeth­yl)ethyl­enedi­amine (bbpen(2−)) and nitrate. Acta Crystallogr E Crystallogr Commun.

Gregório, Thaiane, André Luis Rüdiger, Giovana G. Nunes, Jaísa F. Soares, and David L. Hughes. "Crystal Structure of an Eight-coordinate Terbium(III) Ion Chelated By N,N′-bis­(2-hy­droxy­benz­yl)-N,N′-bis­(pyridin-2-ylmeth­yl)ethyl­enedi­amine (bbpen(2−)) and Nitrate." Acta Crystallogr E Crystallogr Commun 2015.

Gregório, Thaiane, et al. "Crystal Structure of an Eight-coordinate Terbium(III) Ion Chelated By N,N′-bis­(2-hy­droxy­benz­yl)-N,N′-bis­(pyridin-2-ylmeth­yl)ethyl­enedi­amine (bbpen(2−)) and Nitrate." Acta Crystallogr E Crystallogr Commun 2015.