[1] G. H. Hordy: Divergent series. Oxford Univ. Press, London 1949. MR 0030620

[2] T. Kato: Perturbation theory for linear operators. Springer-Verlag, Berlin 1966. MR 0203473 | Zbl 0148.12601

[3] M. Reeken: Summability methods in perturbation theory. J. Math. Phys., 11 (1970) 822-824. DOI 10.1063/1.1665217 | MR 0261393 | Zbl 0208.38802

[4] A. S. Wightman: Should we believe in quantum field theory?. In the Whys of Subnuclear Physics. Ed. by A. Zichihi. Plenum Press, New York 1979.

[5] C. M. Bender, al.: Logarithmic approximations to polynomial lagrangeans. Phys.Rev. Lett., 58 (1987) 2615-2618. DOI 10.1103/PhysRevLett.58.2615 | MR 0893962

[6] G. ť Hofî: On the convergence of planar diagram expansions. Commun. Math. Phys., 86 (1982)449-464. MR 0679194

[7] T. Copson: Asymptotic expansion. Cambridge Univ. Press, Cambridge 1965.

[8] A. Erdélyi: Asymptotic expansions. Dover Publ., Inc., New York 1956. MR 0078494

[9] M. V. Fedorjuk: Asymptotika: Integraly i rjady. Nauka, Moskva 1987.

[10] E. Lindelöf: Une application de la théorie des résidus an prolongement analytique des séries de Taylor. Comptes Rendus, 135 (1902) 1315-1318.

[11] M. Reed B. Simon: Methods of modern mathematical physics IV. Analysis of operators. Academic Press, New York 1978. MR 0493421

[12] G. A. Baker, Jr. P. Graves-Morris: Padé approximants. Adison Wesley Publ. Co., London 1981.

[13] A. Moroz: Novel summability method generalizing the Borel method. Czech. J. Phys., B40 (in print); Summability method for a horn-shaped region. Commun. Math. Phys. (in print).