A. César Gonzalez-Garcia e.a., "Light and Shadows over Petra: Astronomy and Landscape in Nabataean Lands" in Nexus Network Journal (2012) Vol. 15.3
Steven Hijmans, "Usener's Christmas: A Contribution to the Modern Construct of Late Antique Solar Syncretism" in M. Espagne & P. Rabault-Feuerhahn (edd.), Hermann Usener und die Metamorphosen der Philologie. Wiesbaden, Harrassowitz, 2011, p. 139-152
Thomas R. Paradise, "Architecture and Earth-Sun relationships across Petra, Jordan: an inventory of principal structures" in AJoAv.120
Thomas R. Paradise, "Nabataean Architecture and the Sun: landmark discovery using GIS in Petra, Jordan" in esri.com Winter 2015
Amelia Carolina Sparavigna, "Solstices at the Hardknott Roman Fort" in Philica (December 2014)