1. On the linear independence of fractional powers of integers;Besicovitch;J. London Math. Soc.,1940
2. On Canonical Forms and Simplifications;Caviness,1967
3. Grundzüge der Galois'schen Theorie;Chebotarev,1950
4. 4797
5. Classical Galois Theory with Examples;Gaal,1971