ポントリャーギン双対
↑ "Extensions of the Pontryagin duality" 第 I 部: 無限積 (infinite products), Duke Math. J. 15 (1948) 649–658 および第 II 部: 順極限と逆極限 (direct and inverse limits), same journal, 17 (1950),419–435
↑ "Extensions of Pontryagin Duality", Math. Z. 143, 105-112
↑ "The Pontryagin duality of sequential limits of topological Abelian groups", Journal of Pure and Applied Algebra 202 (2005), 11–21