  Most of William's works have not been critically edited; several are extant only in manuscript form. The standard edition, which includes all the works that comprise the Magisterium, is the 1674 Orléans-Paris Opera omnia (OO). (The sermons contained in this edition are by William Perrauld, not William of Auvergne.)  As might be expected, the texts in this old edition are often in need of correction; Teske has conjectured many corrections in his translations.