S.A.M. Yatim and  Z.B. Ibrahim and  K.I. Othman and  F. Ismail,  Fifth Order Variable Step Block Backward Differentiation Formulae for Solving Stiff ODEs.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 235 - 237
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/6379.