Some converse theorems in the asymptotic theory of ordinary differential equations Jaromír Šimša (1988) Czechoslovak Mathematical Journal Similarity:
Asymptotic properties of solutions of differential systems with deviating arguments Eva Špániková (1990) Časopis pro pěstování matematiky Similarity:
Asymptotic expansions of solutions of the equation ( p ( x ) y ' ) ' - q ( x ) y = 0 with complex-valued coefficients Miloš Ráb (1972) Archivum Mathematicum Similarity: