Kamouche, Somia, Hamza Guebbai, Mourad Ghiat, and Muhammet Kurulay. 2022. “The Kantorovich Projection Method in the Generalized Quadratic Spectrum Approximation”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie) 23 (73):240-47. https://doi.org/10.26089/NumMet.v23r315.