@phdthesis{BJHTUP11_1998__0521__P0_0, author = {Moebs, Guy}, title = {Application de m\'ethodes spectrales multi-niveaux \`a diff\'erents probl\`emes de la physique math\'ematique}, series = {Th\`eses d'Orsay}, publisher = {Universit\'e de Paris-Sud Centre d'Orsay}, number = {521}, year = {1998}, language = {fr}, url = {http://archive.numdam.org/item/BJHTUP11_1998__0521__P0_0/} }