Schaefer, Bradley E. (2005). »The Epoch of the Constellations on the Farnese Atlas and Their Origin in Hipparchus's Lost Catalogue«. Journal for the History of Astronomy. 36: 167–96. Bibcode:2005JHA....36..167S.; But see also Duke, Dennis W. (2006). »Analysis of the Farnese Globe«. Journal for the History of Astronomy. 37: 87–100. Bibcode:2006JHA....37...87D.