Publisher
Springer Science and Business Media LLC
Reference6 articles.
1. S. Pride, ?Residual properties of free groups. II,? Bull. Austral. Math. Soc.,7, No. 1, 113?120 (1972).
2. Yu. M. Gorchakov and V. M. Levchuk, ?Approximation of free groups,? Algebra Logika,9, No. 4, 415?421 (1970).
3. W. Magnus, A. Karrass, and D. Solitar, Combinatorial Group Theory, Dover (1976).
4. D. L. McQuillan, ?Some results on the linear fractional group,? Illinois J. Math.,10, No. 1, 24?38 (1966).
5. D. Gierster, ?Über die Galois'sche Gruppe der Modulargleichungen, wenn der Transformationsgrad die Potenz einer Primzahl > 2 ist,? Math. Ann.,26, 309?368 (1886).