Julius Petersen annotated bibliography. - Margit Christiansen; Jesper Lützen; Gert Sabidussi; Bjarne Toft (Discret. Math., 1992)

Julius Petersen 1839-1910 a biography. - Jesper Lützen; Gert Sabidussi; Bjarne Toft (Discret. Math., 1992)