Duncan, W. J., Welzel, O. P., Moroni-Klementowicz, D., Albrecht, C., Niklowitz, P. G., Grüner, D., et al. (2010). Quantum phase transitions in NbFe2 and Ca3Ru2O7. Physica Status Solidi B, 247(3), 544-548. doi:10.1002/pssb.200983079.