D. Sutter. (2018)cite arxiv:1802.05477Comment: 110 pages; PhD thesis, ETH Zurich; to appear as SpringerBriefs in Mathematical Physics; contains material from arXiv:1507.00303, arXiv:1509.07127, arXiv:1604.03023, and arXiv:1705.06749.
J. Teevan, C. Alvarado, M. Ackerman, and D. Karger. Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, page 415--422. New York, NY, USA, ACM, (2004)