Fertig, M. The behavior of integrals of differential equations. (Romanian) Zbl 0227.34047 Stud. Univ. Babes-Bolyai, Ser. I 3, No. 3, 159-164 (1958). MSC: 34E10 PDFBibTeX XMLCite \textit{M. Fertig}, Stud. Univ. Babeș-Bolyai, Ser. Math.-Phys. 3, No. 3, 159--164 (1958; Zbl 0227.34047)
de Bruijn, N. G. Asymptotic methods in analysis. (English) Zbl 0082.04202 Bibliotheca Mathematica. Vol. 4. Amsterdam: North-Holland Publishing Co.; Groningen: P. Noordhoff Ltd. xii, 200 p. (1958). Reviewer: E. M. Wright MSC: 26-01 26A18 26B10 34E05 41A60 44A10 65F10 PDFBibTeX XML