Sara Barati and Karim Ivaz, Variational Iteration Method for Solving Systems of Linear Delay Differential Equations. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. August 2012, vol. 68(8). 964 - 967 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/2307.