"Catoptrica." . . . "Kommentar" . . . . "The Medieval Latin traditions of Euclid's Catoptrica" . "The medieval Latin traditions of Euclid's Catoptrica : a critical edition of De speculis with an introduction, English translation, and commentary"@en . . . "The medieval latin traditions of Euclids catoptrica : a critical edition of De speculis with an introduction, english translation and commentary" . . . "De speculis"@en . . "The medieval Latin traditions of Euclid's Catoptrica : a critical edition of De speculis with an introduction, English translation and commentary" . "The medieval Latin traditions of Euclid's Catoptrica a critical edition of De speculis with an introduction, English translation, and commentary"@en . . . "Early works"@en . . . . . . . . . . . . . . . "Optique Histoire." . . "Histoire." . . "Übersetzung." . . "Optique." . . "Mittellatein." . . . .