Chibuisi, C., B. O. Osu, U. W. Sirisena, K. Uchendu, and C. Granados. “The Computational Solution of First Order Delay Differential Equations Using Second Derivative Block Backward Differentiation Formulae”. International Journal of Mathematical Sciences and Optimization: Theory and Applications, Vol. 7, no. 2, Mar. 2022, pp. 88 - 106, doi:10.52968/28304669.