[1] W. A. Coppel:
Stability and Asymptotic Behavior of Differential Equations. Heath, Boston, 1965.
MR 0190463 |
Zbl 0154.09301
[4] T. G. Hallam:
Asymptotic integration of second order differential equations with integrable coefficients. SIAM J. Appl. Math. 19 (1970), 430-439.
DOI 10.1137/0119041 |
MR 0269935