Testici, Ahmet, and Daniyal Israfilov. “ Approximation by Matrix Transform in Generalized Grand Lebesgue Spaces With Variable Exponent”. J. Numer. Anal. Approx. Theory, vol. 50, no. 1, Nov. 2021, pp. 60-72, https://doi.org/10.33993/jnaat501-1234.