In this paper, the distance between adjacent ze
ros of oscillatory solutions for second order nonlinear neutral delay differential equations
class="formula" id="fd000005">
where
class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0893965916302051&_mathId=si2.gif&_user=111111111&_pii=S0893965916302051&_rdoc=1&_issn=08939659&md5=559d9a05c1f92005d5a28801b3dd08c3" title="Click to view the MathML source">z(t)=x(t)+p(t)x(t−τ)class="mathContainer hidden">class="mathCode"> is investigated. By means of inequality techniques, specific function sequences and nonincreasing solutions for corresponding first order differential inequality, some new estimates for the distribution of ze
ros of oscillatory solutions have been presented, which have extended and imp
roved some known results.