Popmintchev, T., Chen, M.-C., Popmintchev, D., Arpin, P., Brown, S., Alisauskas, S., Andriukaitis, G., Balciunas, T., Mücke, O. D., Pugzlys, A., Baltuska, A., Shim, B., Schrauth, S. E., Gaeta, A. L., Hernandez-Garcia, C., Plaja, L., Becker, A., Jaron-Becker, A., Murnane, M. M., & Kapteyn, H. C. (2012). Towards Zeptosecond X-ray Pulses. In Proceedings of the 5th EPS-QEOD Europhoton Conference (p. 1). http://hdl.handle.net/20.500.12708/73261