@article{CRMATH_2002__335_2_145_0,
     author = {Antonio Ambrosetti and Andrea Malchiodi and Wei-Ming Ni},
     title = {Solutions, concentrating on spheres, to symmetric singularly perturbed problems},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {145--150},
     publisher = {Elsevier},
     volume = {335},
     number = {2},
     year = {2002},
     doi = {10.1016/S1631-073X(02)02414-7},
     language = {en},
}