Vitanyi, Paul M. B. (). „Information Distance in Multiples”. IEEE Transactions on Information Theory. 57 (4): 2451. doi:10.1109/TIT.2011.2110130.
Cohen, Andrew R.; Vitanyi, Paul M. B. (). „Normalized Compression Distance of Multisets with Applications”. IEEE Transactions on Pattern Analysis and Machine Intelligence. 37 (8): 1602–1614. doi:10.1109/TPAMI.2014.2375175.
Fraigniaud, P.; Lebhar, E.; Viennot, L. (). „The Inframetric Model for the Internet”. 2008 IEEE INFOCOM - The 27th Conference on Computer Communications. IEEE INFOCOM 2008. the 27th Conference on Computer Communications. pp. 1085–1093. doi:10.1109/INFOCOM.2008.163. ISBN978-1-4244-2026-1.Fraigniaud, P.; Lebhar, E.; Viennot, L. (). „The Inframetric Model for the Internet”. 2008 IEEE INFOCOM - The 27th Conference on Computer Communications. IEEE INFOCOM 2008. the 27th Conference on Computer Communications. pp. 1085–1093. doi:10.1109/INFOCOM.2008.163. ISBN978-1-4244-2026-1..
Rolewicz, Stefan (), Functional Analysis and Control Theory: Linear Systems, Springer, ISBN90-277-2186-6, OCLC13064804 Această carte le spune „semimetrici”. Același termen este frecvent folosit și pentru alte două generalizări ale metricilor.