Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance
A. Pustogow, Yongkang Luo, A. Chronister, Y.-S. Su, D. A. Sokolov, F. Jerzembeck, A. P. Mackenzie, C. W. Hicks, N. Kikugawa, S. Raghu, E. D. Bauer, S. E. Brown.