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MR ZblOláh, Rudolf. On positive solutions of nonlinear retarded differential equations. Mathematica slovaca, Tome 42 (1992) no. 2, pp. 201-210. http://geodesic.mathdoc.fr/item/MASLO_1992_42_2_a7/
@article{MASLO_1992_42_2_a7,
author = {Ol\'ah, Rudolf},
title = {On positive solutions of nonlinear retarded differential equations},
journal = {Mathematica slovaca},
pages = {201--210},
year = {1992},
volume = {42},
number = {2},
mrnumber = {1170104},
zbl = {0756.34070},
language = {en},
url = {http://geodesic.mathdoc.fr/item/MASLO_1992_42_2_a7/}
}
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