F. Tran, J. Doumont, P. Blaha, M. Marques, S. Botti, A. Bartok:
"On the calculation of the bandgap of periodic solids with MGGA functionals using the total energy";
Journal of Chemical Physics, 151 (2019), 16102.
http://dx.doi.org/10.1063/1.5126393Electronic version of the publication:
https://publik.tuwien.ac.at/files/publik_282251.pdf