1. S.S. Akhiev, Representations of the solutions of some linear operator equations, Sov. Math., Dokl., 21(2):555–558, 1980.
2. S.S. Akhiev, Fundamental solutions of functional differential equations and their representations, Sov. Math., Dokl., 29(2):180–184, 1984.
3. S.S. Akhiev, Green and generalized Green’s functionals of linear local and nonlocal problems for ordinary integrodifferential equations, Acta Appl. Math., 95:73–93, 2007.
4. S.S. Akhiev and K. Oruçoğlu, Fundamental solutions of some linear operator equations and applications, Acta Appl. Math., 71:1–30, 2002.
5. I. Ali, H. Brunner, and T. Tang, A spectral method for pantograph-type delay differential equations and its convergence analysis, J. Comput. Math., 27(2–3):254–265, 2009.