Hasanah, L., K. Khairurrijal, M. Abdullah, T. Winata, and S. Sukirno. “An Improved Analytic Method Based on Airy Functions Approach to Calculate Electron Direct Transmittance in Anisotropic Heterostructure With Bias Voltage”. Indonesian Journal of Physics, Vol. 17, no. 3, Nov. 2016, pp. 77-81, https://ijphysics.fi.itb.ac.id/index.php/ijp/article/view/141.