@article{700343,
title = {Positive and oscillating solutions of equation $\dot{x}(t)=-c(t) x(t-\tau )$
},
booktitle = {Equadiff 10},
series = {GDML\_Books},
publisher = {Masaryk University},
address = {Brno},
year = {2002},
pages = {129-131},
url = {http://dml.mathdoc.fr/item/700343}
}
Diblík, Josef. Positive and oscillating solutions of equation $\dot{x}(t)=-c(t) x(t-\tau )$
, dans Equadiff 10, GDML_Books, (2002), pp. 129-131. http://gdmltest.u-ga.fr/item/700343/