@article{AMI_2003_30_a15,
     author = {V. V. Shpakov and N. N. Vorob{\textquoteright}ev and N. T. Vorob{\textquoteright}ev},
     title = {On intersection of normal fitting classes of finite groups},
     journal = {Annales mathematicae et informaticae},
     pages = {167--171},
     publisher = {mathdoc},
     volume = {30},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2003_30_a15/}
}