집합론

• Dauben, Joseph W. ‘The Trigonometric Background to Georg Cantor’s Theory of Sets’. Archive for History of Exact Sciences 7, no. 3 (1 January 1971): 181–216. doi:10.1007/BF00357216.
• Doyle, Peter G., and Cecil Qiu. ‘Division by Four’. arXiv:1504.01402 [math], 6 April 2015. http://arxiv.org/abs/1504.01402.