TRIPATHY, A.K. and SANTRA, S.S. 2020. On oscillatory second order nonlinear impulsive systems of neutral type. Studia Universitatis Babeș-Bolyai Mathematica. 65, 4 (Nov. 2020), 503–519. DOI:https://doi.org/10.24193/subbmath.2020.4.03.