Arhrrabi, Elhoussain, and Hamza El-Houari. “Fractional Sobolev Space: Study of Kirchhoff-Schrödinger Systems With Singular Nonlinearity”. CUBO, A Mathematical Journal 26, no. 3 (October 8, 2024): 407–430. Accessed October 12, 2025. https://cubo.ufro.cl/index.php/cubo/article/view/3818.