Author: Usami, Hiroyuki

Luey, Sokea; Usami, Hiroyuki: Asymptotic forms of solutions of perturbed half-linear ordinary differential equations. (English). Archivum Mathematicum, vol. 57 (2021), issue 1, pp. 27-39
Kamo, Ken-ichi; Usami, Hiroyuki: Positive unbounded solutions of second order quasilinear ordinary differential equations and their application to elliptic problems. (English). Czechoslovak Mathematical Journal, vol. 58 (2008), issue 4, pp. 1153-1165
Kusahara, Toshiaki; Usami, Hiroyuki: A barrier method for quasilinear ordinary differential equations of the curvature type. (English). Czechoslovak Mathematical Journal, vol. 50 (2000), issue 1, pp. 185-196