Politicheskie struktury ėpokhi feodalizma v Zapadnoĭ Evrope : VI-XVII vv - Rutenburg, V. I. (Viktor Ivanovich), 1911-; Medvedev, I. P.; Thomas, Aquinas, Saint, 1225?-1274; Thomas, Aquinas, Saint, 1225?-1274 ("Nauka," Leningradskoe otd-nie, 1990)