@article{10_1007_s10492_009_0030_8,
     author = {Woukeng, Jean Louis},
     title = {$\Sigma $-convergence of nonlinear monotone operators in perforated domains with holes of small size},
     journal = {Applications of Mathematics},
     pages = {465--489},
     publisher = {mathdoc},
     volume = {54},
     number = {6},
     year = {2009},
     doi = {10.1007/s10492-009-0030-8},
     mrnumber = {2563121},
     zbl = {1212.35023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-009-0030-8/}
}