V. Muthulakshmi, R. Manjuram. Interval Oscillation Criteria for Second-order Forced Delay Differential Equation with Riemann-Stieltjes Integral. Int. J. Math. And Appl. [Internet]. 2018 Jan. 20 [cited 2024 May 9];6(1 - B):281-95. Available from: http://ijmaa.in/index.php/ijmaa/article/view/924