S. Abbagari, A. Houwe, H. Rezazadeh, A. Bekir, and S. Y. Doka, “Solitary wave solutions in two-Core optical fibers with coupling-coefficient dispersion and Kerr nonlinearity”, Rev. Mex. Fís., vol. 67, no. 3 May-Jun, pp. 369–377, May 2021.