Zhiting Xu, Baoguo Jia, Dongkui Ma. Oscillation theorems for elliptic equations with damping. Applied Mathematics and Computation, 156(1):93-106, 2004. [doi]
@article{XuJM04,
title = {Oscillation theorems for elliptic equations with damping},
author = {Zhiting Xu and Baoguo Jia and Dongkui Ma},
year = {2004},
doi = {10.1016/j.amc.2003.07.005},
url = {http://dx.doi.org/10.1016/j.amc.2003.07.005},
researchr = {https://researchr.org/publication/XuJM04},
cites = {0},
citedby = {0},
journal = {Applied Mathematics and Computation},
volume = {156},
number = {1},
pages = {93-106},
}