J. D. Axe, 1989, Phys. Rev. Lett., 62, 2751, 10.1103/PhysRevLett.62.2751
G. M. Luke, 1991, Physica C, 185–9, 185
K. Kumagai, 1994, Hyperfine Interact., 86, 473, 10.1007/BF02068936
G. M. Luke, 1997, Hyperfine Interact., 105, 113, 10.1023/A:1012670430673
F. Borsa, 1995, Phys. Rev. B, 52, 7334, 10.1103/PhysRevB.52.7334
A. H. Castro Neto, 1996, Phys. Rev. Lett., 76, 2165, 10.1103/PhysRevLett.76.2165
S-W. Cheong, 1991, Phys. Rev. Lett., 67, 1791, 10.1103/PhysRevLett.67.1791
T. R. Thurston, 1992, Phys. Rev. B, 46, 9128, 10.1103/PhysRevB.46.9128
T. E. Mason, 1993, Phys. Rev. Lett., 71, 919, 10.1103/PhysRevLett.71.919
J. M. Tranquada, 1995, Nature (London), 375, 561, 10.1038/375561a0
J. M. Tranquada, 1997, Phys. Rev. Lett., 78, 338, 10.1103/PhysRevLett.78.338
J. M. Tranquada, 1996, Phys. Rev. B, 54, 7489, 10.1103/PhysRevB.54.7489
T. Nagano, 1993, Phys. Rev. B, 48, 9689, 10.1103/PhysRevB.48.9689
M. K. Crawford, 1991, Phys. Rev. B, 44, 7749, 10.1103/PhysRevB.44.7749
Y. Nakamura, 1992, Phys. Rev. B, 46, 5841, 10.1103/PhysRevB.46.5841
B. Büchner, 1994, Phys. Rev. Lett., 73, 1841, 10.1103/PhysRevLett.73.1841
J. M. Tranquada, 1994, Phys. Rev. Lett., 73, 1003, 10.1103/PhysRevLett.73.1003
Yimei Zhu, 1994, Phys. Rev. Lett., 73, 3026, 10.1103/PhysRevLett.73.3026
J. E. Ostenson, 1997, Phys. Rev. B, 56, 2820, 10.1103/PhysRevB.56.2820
Y. J. Uemura, 1987, Phys. Rev. Lett., 59, 1045, 10.1103/PhysRevLett.59.1045
Y. J. Uemura, 1988, Physica C, 153-155, 769, 10.1016/S0921-4534(88)80079-0
D. R. Harshman, 1988, Phys. Rev. B, 38, 852, 10.1103/PhysRevB.38.852
B. Hitti, 1990, Hyperfine Interact., 63, 287, 10.1007/BF02396016
W. Wagener, 1997, Hyperfine Interact., 105, 107, 10.1023/A:1012618413835
A. Lappas, 1997, Hyperfine Interact., 105, 101, 10.1023/A:1012666329764
K. M. Kojima, 1997, Phys. Rev. Lett., 78, 1787, 10.1103/PhysRevLett.78.1787
A. Keren, 1994, Phys. Rev. Lett., 72, 3254, 10.1103/PhysRevLett.72.3254
R. S. Hayano, 1979, Phys. Rev. B, 20, 850, 10.1103/PhysRevB.20.850
R. H. Heffner, 1996, Phys. Rev. Lett., 77, 1869, 10.1103/PhysRevLett.77.1869
Ian Affleck, 1994, J. Phys. A, 27, 7313, 10.1088/0305-4470/27/22/009
K. Kojima, 1995, Phys. Rev. Lett., 74, 2812, 10.1103/PhysRevLett.74.2812
D. Vaknin, 1990, Phys. Rev. B, 41, 1926, 10.1103/PhysRevB.41.1926
A. Keren, 1993, Phys. Rev. B, 48, 12, 10.1103/PhysRevB.48.12926
S. Shamoto, 1993, Phys. Rev. B, 48, 13, 10.1103/PhysRevB.48.13817
V. J. Emery, 1997, Phys. Rev. B, 56, 6120, 10.1103/PhysRevB.56.6120
A. H. Castro Neto, 1996, Phys. Rev. Lett., 76, 2165, 10.1103/PhysRevLett.76.2165