@article{10_4153_CJM_1980_069_8,
     author = {Noussair, E. S. and Swanson, C. A.},
     title = {Oscillation of {Semilinear} {Elliptic} {Inequalities} by {Riccati} {Transformations}},
     journal = {Canadian journal of mathematics},
     pages = {908--923},
     year = {1980},
     volume = {32},
     number = {4},
     doi = {10.4153/CJM-1980-069-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1980-069-8/}
}