B. H. Giang, N. T. Trang, T. V. Nam and B. T. Cong, Magnetism in the Interfaces of the Sandwiched PbTiO\(_3\)/LaAlO\(_3\)/SrTiO\(_3\) Hetero-structure, Comm. Phys. 25 (2015) 219. DOI: https://doi.org/10.15625/0868-3166/25/3/4423.