V. Hardy, A. Wahl, A. Ruyter, A. Maignan, C. Martin, L. Coudrier, J. Provost, Ch. Simon,
The fishtail effect in different Tl based single crystals. A possible interplay with the electronic anisotropy Physica C-superconductivity and Its Applications. ,vol. 232, pp. 347- 358 ,(1994) ,
10.1016/0921-4534(94)90793-5