Del Fiol G, Huser V, Strasberg HR, Maviglia SM, Curtis C, Cimino JJ. Implementations of the HL7 Context-Aware Knowledge Retrieval ("Infobutton") Standard: challenges, strengths, limitations, and uptake. J Biomed Inform. 2012 Aug;45(4):726-35. doi: 10.1016/j.jbi.2011.12.006.. Epub 2012 Jan 2.