M. Hillar: "Poland's Contribution to the Reformation: Socinians/Polish Brethren and Their Ideas on the Religious Freedom," The Polish Review, Vol. XXXVIII, No.4, pp. 447–468, 1993.
M. Hillar, "From the Polish Socinians to the American Constitution," in A Journal from the Radical Reformation. A Testimony to Biblical Unitarianism, Vol. 4, No. 3, pp. 22–57, 1994.
M. Hillar, "The Philosophical Legacy of the XVIth and XVIIth Century Socinians: Their Rationality." in the book "The Philosophy of Humanism and the Issues of Today," eds. M. Hillar and F. Prahl, pp. 117–126, American Humanist Association, Houston, 1995.
Marian Hillar, “The Philosophical Legacy of the 16th and 17th Century Socinians: Their
Rationality.” In The Proceedings of the Twentieth World Congress of Philosophy, Alan M. Olson, Executive Editor, Vol 4. Philosophies of religion, Art, and Creativity, Kevin Stoehr (ed.), (Charlottesville, Virginia: Philosophy Documentation Center, 1999)
Marian Hillar, “The XVIth and XVIIth Century Socinians: Precursors of Freedom of
Conscience, of Separation of Church and State, and of the Enlightenment.” In Essays in the Philosophy of Humanism, Vol. 9, pp. 35–60, 2001, eds. Robert D. Finch, Marian Hillar, American Humanist Association, Houston, TX 2001.
Marian Hillar, “Laelius and Faustus Socinus Founders of Socinianism: Their Lives and
Theology.” Part 1. Journal from the Radical Reformation. Testimony to Biblical Unitarianism, Vol. 10, No. 2. Winter 2002. pp. 18–38.
Marian Hillar, “Laelius and Faustus Socinus Founders of Socinianism: Their Lives and Theology.” Part 2. Journal from the Radical Reformation. Testimony to Biblical Unitarianism, Vol. 10, No. 3. Spring 2002. pp. 11–24.
