Vieyra, H. A., Oeschler, N., Seiro, S., Jeevan, H. S., Geibel, C., Parker, D., et al. (2011). Determination of Gap Symmetry from Angle-Dependent Hc2 Measurements on CeCu2Si2. Physical Review Letters, 106(20): 207001, pp. 207001-1-207001-4. doi:10.1103/PhysRevLett.106.207001.