S. N. Zhang et al., XTP: Enhanced X-ray timing and polarization mission,” in Proceedings of the SPIE, 2016, vol. 9905.
LibreCat: https://research-explorer.ista.ac.at/record/15245
DOI: 10.1117/12.2232034
arXiv: 1607.08823

M. H. Henzinger, “The past, present, and future of web information retrieval,” in SPIE Proceedings, San Jose, CA, United States, 2004, vol. 5296, pp. 23–26.
LibreCat: https://research-explorer.ista.ac.at/record/11859
DOI: 10.1117/12.537534