S. Benacka, V. Strbik, S. Chromik, R. Adam, M. Darula, and S. Gazi, Mechanisms of critical current limitation in YBCO thin film structures, Low Temp. Phys. 24, (1998) [Fiz. Nizk. Temp. 24, 621-623, (1998)] DOI: https://doi.org/10.1063/1.593624.