Authors: Huiszoon, LR Schellekens, AN

Citation: Lr. Huiszoon et An. Schellekens, Crosscaps, boundaries and T-duality, NUCL PHYS B, 584(3), 2000, pp. 705-718

Authors: Huiszoon, LR Schellekens, AN Sousa, N

Citation: Lr. Huiszoon et al., Open descendants of non-diagonal invariants, NUCL PHYS B, 575(1-2), 2000, pp. 401-415

Authors: Fuchs, J Huiszoon, LR Schellekens, AN Schweigert, C Walcher, J

Citation: J. Fuchs et al., Boundaries, crosscaps and simple currents, PHYS LETT B, 495(3-4), 2000, pp. 427-434

Authors: Huiszoon, LR Schellekens, AN Sousa, N

Citation: Lr. Huiszoon et al., Klein bottles and simple currents, PHYS LETT B, 470(1-4), 1999, pp. 95-102