Gruner, T., Wykhoff, J., Sichelschmidt, J., Krellner, C., Geibel, C., & Steglich, F. (2010). Anisotropic electron spin resonance of YbIr2Si2. Journal of Physics: Condensed Matter, 22: 135602, pp. 135602-1-135602-5. doi:10.1088/0953-8984/22/13/135602.