Viro, O. (2008). Elementary topology: Problem textbook. American Mathematical Society.
シカゴスタイル引用形Viro, O.Ya. Elementary Topology: Problem Textbook. Providence, R.I.: American Mathematical Society, 2008.
MLA引用形式Viro, O.Ya. Elementary Topology: Problem Textbook. American Mathematical Society, 2008.
警告: この引用は必ずしも正確ではありません.