. "ON APPROXIMATE SOLUTION OF HIGH-ORDER LINEAR FREDHOLM INTEGRO-DIFFERENTIAL-DIFFERENCE EQUATIONS WITH VARIABLE COEFFICIENTS USING LEGENDRE COLLOCATION METHOD A. O. ADESANYA, J. A. OSILAGUN, O. O. ADUROJA AND S. ADAMU", Electronic Journal of Mathematical Analysis and Applications, 11, 1, 2023, 198-205. doi: 10.21608/ejmaa.2023.284583