## References for: Trisecting an angle

Version for printing

**Books:**
- T L Heath,
*A history of Greek mathematics* **I** (Oxford, 1931).
- I Thomas,
*Selections illustrating the history of Greek mathematics : Vol 1 (From Thales to Euclid)* (London, 1967).
- I Thomas,
*Greek mathematical works* (London, 1939).

**Articles:**

- Chen, Tzer-lin Proof of the impossibility of trisecting an angle with Euclidean tools,
*Math. Mag.* **39** (1966), 239-241.
- J Delattre and R Bkouche, Why ruler and compass?, in
*History of Mathematics : History of Problems* (Paris, 1997), 89-113.

JOC/EFR April 1999
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