"Effects of Grain Boundaries on Temperature Dependence of Microwave Surface Resistance of YBa2Cu3O7-x Thin Films"
Mazwi Ben Tunyiswa, Kensuke Nakajima, Jian Chen, Sang-Jae Kim, Huabing Wang, Tsutomu Yamashita,
Japanese journal of applied physics,
37(10R),
1998,
5540