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A. M. Sagir,  Numerical Treatment of Block Method for the Solution of Ordinary Differential Equations.   journal   = {International Journal of Mathematical, Computational, Physical, Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2014, vol. 86(2). 259 - 263[viewed 26 September 2018]. Available from: http://waset.org/publications/9997352.