■

• Henry Maurice Sheffer　　“A Set of Five Independent Postulates for Boolean Algebras, with Applications to Logical Constants,”　in: Transactions of the American Mathematical Society, vol. 14, no. 4, 1913
• Nicolas Rescher　　“The Berlin School of Logical Empiricism and its Legacy,”　in: Erkenntnis, vol. 64, no. 3, 2006