Formal and Analytic Solutions of Diff. Equations FASdiff, Alcalá de Henares, Spain, September 2017, Selected, Revised Contributions - Filipuk, Galina; Filipuk, Galina; Lastra, Alberto; Lastra, Alberto; Michalik, Sławomir; Michalik, Sławomir (Springer International Publishing : Imprint: Springer, 2018)