@book { DynamicRelaxationMethodTheoreticalAnalysisSolvedExamplesandComputerProgramming,
    title = "Dynamic Relaxation Method. Theoretical Analysis, Solved Examples and Computer Programming",
    author = "Osama {Mohammed Elmardi}",
    year = "2016",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/339507"
}