@article{CMH_1983__58_139943,
     author = {M.N. Huxley},
     title = {Cheeger's inequality with a boundary term.},
     journal = {Commentarii mathematici Helvetici},
     pages = {347--354},
     publisher = {mathdoc},
     volume = {58},
     year = {1983},
     zbl = {0524.58046},
     url = {http://geodesic.mathdoc.fr/item/CMH_1983__58_139943/}
}