1. Liu, L.F., Zhang, X.L. & Kou, S.P. (2012). Symmetry-protected quantum phase transition in topological insulators. The European Physical Journal B (85): 271. doi.org/10.1140/epjb/e2012-30123-2

2. Wei, J. H., & Chen, L. (2014). Symmetry protection of quantum phase transitions in honeycomb lattice. Physica B: Condensed Matter, 432, 8-11. doi.org/10.1016/j.physb.2013.09.028

3. Liu, Z., Wang, R., Deng, M., & Hu, L. (2015). Magnetically controlled electronic transport properties of a ferromagnetic junction on the surface of a topological insulator. Communications in Theoretical Physics, 63(6), 777. doi.org/10.1088/0253-6102/63/6/777