Wagner, Marcel, Felix Dangel, Holger Cartarius, Jörg Main, and Günter Wunner. “NUMERICAL CALCULATION OF THE COMPLEX BERRY PHASE IN NON-HERMITIAN SYSTEMS”. Acta Polytechnica 57, no. 6 (December 30, 2017): 470–476. Accessed February 27, 2024. https://ojs.cvut.cz/ojs/index.php/ap/article/view/4182.