PHYSICA C, vol. 271, no. 3-4, page. 356 - 364, 1996-11-10
PHYSICA C, vol. 254, no. 1-2, page. 167 - 174, 1995-11-10
PHYSICA C, vol. 203, no. 3-4, page. 385 - 392, 1992-12-10
PHYSICA C, vol. 194, no. 3-4, page. 293 - 300, 1992-05-10