1. OWL Concept Design Report 2005, Tech. rep., ESO document OWL-TRE-ESO-0000-0001 Issue 2
2. Barbieri, C., Da Deppo, V., D'Onofrio, M., et al. 2006, in The scientific requirements for extremely large telescopes, ed. P. Whitelock, B. Leibundgut, & M. Dennefeld, IAU Symp., 232, 506
3. Astronomical applications of quantum optics for extremely large telescopes
4. Barbieri, C., Daniel, M., de Wit, W., et al. 2009a, New Astrophysical Opportunities Exploiting Spatio-Temporal Optical Correlations, Science white paper prepared for the Astro2010 Decadal Review, available at [arXiv:0903.0062]