@article{CRMATH_2006__342_4_285_0,
     author = {Zhang, Sheng},
     title = {Equivalence estimates for a class of singular perturbation problems},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {285--288},
     publisher = {Elsevier},
     volume = {342},
     number = {4},
     year = {2006},
     doi = {10.1016/j.crma.2005.10.004},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2005.10.004/}
}