N. Chandgotia, R. Peled, S. Sheffield, и M. Tassy. (2018)cite arxiv:1810.10124Comment: 21 pages, 2 Figures. Corrected Lemma 4.2 (Lemma 4.12 in the current version) from the previous version.
F. Cibrian, M. Tentori, и N. Weibel. Proceedings of the 10th EAI International Conference on Pervasive Computing Technologies for Healthcare, стр. 241--244. ICST, Brussels, Belgium, Belgium, ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering), (2016)Poster.