Ding, Q.; Wiecki, P.; Anand, V.; Sangeetha, N.; Lee, Y.; Johnston, D.; Furukawa, Y.: Volovik effect and Fermi-liquid behavior in the s-wave superconductor CaPd2As2: 75As NMR-NQR measurements. Physical Review B 93 (2016), p. 140502/1-5
10.1103/PhysRevB.93.140502