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"Villa Ada". Romecentral.com. Archived from the original on 15 September 2010. Retrieved 28 September 2009.
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in summo Esquiliarum monteibid, 18. The Palatium Licinianum stood near the site of the church of Santa Balbina; an arcus Gallieni stood at the Esquiline gate (porta Esquilina) LacusCurtius.com: Horti, with bibliography
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"Green Areas". RomaPerKyoto.org. Archived from the original on 4 February 2008. Retrieved 9 November 2008.
"Villa Ada". Romecentral.com. Archived from the original on 15 September 2010. Retrieved 28 September 2009.