Jianhua Shen, Lokenath Debnath. Oscillations of solutions of neutral differential equations with positive and negative coefficients. Appl. Math. Lett., 14(6):775-781, 2001. [doi]
@article{ShenD01, title = {Oscillations of solutions of neutral differential equations with positive and negative coefficients}, author = {Jianhua Shen and Lokenath Debnath}, year = {2001}, doi = {10.1016/S0893-9659(01)80041-0}, url = {http://dx.doi.org/10.1016/S0893-9659(01)80041-0}, researchr = {https://researchr.org/publication/ShenD01}, cites = {0}, citedby = {0}, journal = {Appl. Math. Lett.}, volume = {14}, number = {6}, pages = {775-781}, }