@article{AIHPC_2012__29_4_501_0,
     author = {Zhang, Meirong},
     title = {Minimization of the zeroth {Neumann} eigenvalues with integrable potentials},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {501--523},
     publisher = {Elsevier},
     volume = {29},
     number = {4},
     year = {2012},
     doi = {10.1016/j.anihpc.2012.01.007},
     mrnumber = {2948286},
     zbl = {1252.34099},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2012.01.007/}
}