Wunner, G., H. Cartarius, P. Koeberle, J. Main, and S. Rau. 2011. “Exceptional Points for Nonlinear Schroedinger Equations Describing Bose-Einstein Condensates of Ultracold Atomic Gases”. Acta Polytechnica 51 (4). https://doi.org/10.14311/1418.