@article{bwmeta1.element.bwnjournal-article-aav34i4p287bwm,
author = {Cusick, T. and Mend\`es France, Michel},
title = {The Lagrange spectrum of a set},
journal = {Acta Arithmetica},
volume = {35},
year = {1979},
pages = {287-293},
zbl = {0409.10020},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav34i4p287bwm}
}
Cusick, T.; Mendès France, Michel. The Lagrange spectrum of a set. Acta Arithmetica, Tome 35 (1979) pp. 287-293. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav34i4p287bwm/