Friák, M., Hickel, T., Grabowski, B., Lymperakis, L., Udyansky, A., Dick, A., et al. (2011). Methodological challenges in combining quantum-mechanical and continuum approaches for materials science applications. European Physics Journal Plus, 126, 101-1-101-22. doi:10.1140/epjp/i2011-11101-2.