T. D. Cong, T. L. Thanh, H. M. Tri, P. T. T. Bao, and T. Hoang "Applications of TCAD Simulation Software for Fabrication and study of Process Variation Effects on Threshold Voltage in 180nm Floating-Gate Device", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 146–152, 2021, doi: 10.25046/aj060116.