REFERENCES
- Chillag , D. , Macdonald , L. D. ( 1984 ). Generalized Frobenius groups . Israel J. Math. 47 : 111 – 122 .
- Dark , R. , Scoppola , C. M. ( 1996 ). On Camina groups of prime power order . J. Algebra 181 : 787 – 802 .
- Qian , G. H. , Shi , W. J. , You , X. Z. ( 2004 ). Conjugacy classes outside a normal subgroup . Commun. Algebra 32 ( 12 ): 4809 – 4820 .
- Communicated by A. Olshanskii.