WASET
Ishak, F. , Suleiman, M. , Majid, Z. , Othman, K.. "Development of Variable Stepsize Variable Order Block Method in Divided Difference Form for the Numerical Solution of Delay Differential Equations". World Academy of Science, Engineering and Technology, Open Science Index 53, International Journal of Mathematical and Computational Sciences (2011), 5(5), 728 - 733.