TY  - JOUR
AU  - Kao, Chiu-Yen
AU  - Osting, Braxton
TI  - Extremal spectral gaps for periodic Schrödinger operators
JO  - ESAIM: Control, Optimisation and Calculus of Variations
PY  - 2019
VL  - 25
PB  - EDP-Sciences
UR  - http://archive.numdam.org/articles/10.1051/cocv/2018029/
DO  - 10.1051/cocv/2018029
LA  - en
ID  - COCV_2019__25__A40_0
ER  -