@article{5ee1eb82593a449ca135e31009c5de3d,
title = "Semi-nonoscillation intervals in the analysis of sign constancy of Green{\textquoteright}s functions of Dirichlet, Neumann and focal impulsive problems",
abstract = "We consider the following second order differential equation with delay: (Formula presented.) In this paper we use focal problems to analyze the sign constancy of Green{\textquoteright}s functions.",
keywords = "Green{\textquoteright}s functions, boundary value problem, impulsive equations, positivity/negativity of Green{\textquoteright}s functions, second order",
author = "Alexander Domoshnitsky and Guy Landsman",
note = "Publisher Copyright: {\textcopyright} 2017, The Author(s).",
year = "2017",
month = dec,
day = "1",
doi = "https://doi.org/10.1186/s13662-017-1134-1",
language = "الإنجليزيّة",
volume = "2017",
journal = "Advances in Difference Equations",
issn = "1687-1839",
publisher = "Springer Publishing Company",
number = "1",
}