Yen, N. T. H., L. D. Anh, H. A. Tuan, N. T. Thang, and N. T. Huong. “Mott Transition in the Mass Imbalanced Ionic Hubbard Model at Half Filling”. Communications in Physics, vol. 29, no. 3SI, Oct. 2019, p. 305, doi:10.15625/0868-3166/29/3SI/14265.