BARAN, O. Energy Flux Effect in the One-Dimensional Spin-1/2 XX Model of Magnetoelectric. Lagrange Multiplier Method. Ukrainian Journal of Physics, [S. l.], v. 66, n. 10, p. 890, 2021. DOI: 10.15407/ujpe66.10.890. Disponível em: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2021032. Acesso em: 6 dec. 2021.