1. Grasso G, Hensel B, Jeremie Jand Flukiger R, (1995) Physica C 241: 45–52
2. Mogilko E and Schlesinger Y, (1997) Physica C 282–287: 2349–2350
3. Amatatsu N, Ikeda H, Yoshikawa K, Koyano T and Yoshizaki R, (1998) Advances in Superconductivity X: 845–848
4. Kawasaki K, Ikeda H, Yoshikawa K and Yoshizaki R, (1997) Advances in Superconductivity IX: 899–902
5. Kawasaki K, Ikeda H, Yoshizaki R and Yoshikawa K, (1996) Proceeding of ICEC 16/ICMC: 1435–1438