Lüdecke, J., Jobst, A., van Smaalen, S., Morré, E., Geibel, C., & Krane, H.-G. (1999). Acentric Low-Temperature Superstructure of NaV2O5. Physical Review Letters, 82(18), 3633-3636. doi:10.1103/PhysRevLett.82.3633.