Tsui, Y., Brühl, A., Removic-Langer, K., Pashchenko, V., Wolf, B., Donath, G., Pikul, A., Kretz, T., Lerner, H.-W., Wagner, M., Salguero, A., Saha-Dasgupta, T., Rahaman, B., Valenti, R., & Lang, M. (2007). Field-induced phase transition in a metalorganic spin-dimer system - a potential model system to study Bose-Einstein condensation of magnons. Journal of Magnetism and Magnetic Materials, 310, 1319-1321. doi:10.1016/j.jmmm.2006.10.844.