%0 Journal Article %A J. Garnett %A Eugene Trubowitz %T Gaps and bands of one dimensional periodic Schrödinger operators. %J Commentarii mathematici Helvetici %D 1984 %P 258-312 %V 59 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1984__59_139977/ %F CMH_1984__59_139977