Berlin, Staatsbibliothek Preussischer Kulturbesitz Lat. qu. 510                        fol. 4, figures I.44  et  I.47 nommée dulcarnon.                           Berlin 2012        α     
                                                                                                          
                                                                                                                                     Johan Ludvig Heiberg, The Thirteen Books of Euclid's Elements, Volume 1