@article{10_21136_MB_2020_0063_19, author = {Tripathy, Arun K. and Santra, Shyam S.}, title = {Necessary and sufficient conditions for oscillation of second-order differential equations with nonpositive neutral coefficients}, journal = {Mathematica Bohemica}, pages = {185--197}, publisher = {mathdoc}, volume = {146}, number = {2}, year = {2021}, doi = {10.21136/MB.2020.0063-19}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2020.0063-19/} }