@article{10_4153_CMB_1976_020_7,
     author = {Allegretto, W.},
     title = {Oscillation {Criteria} for {Semilinear} {Equations} in {General} {Domains}},
     journal = {Canadian mathematical bulletin},
     pages = {137--144},
     year = {1976},
     volume = {19},
     number = {2},
     doi = {10.4153/CMB-1976-020-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1976-020-7/}
}