The theory of infinite soluble groups حسب Lennox, John C., Robinson, Derek J. S.

Available for University of the Philippines Diliman via Oxford Scholarship Online. Click here to access:

The theory of infinite soluble groups حسب Lennox, John C., Robinson, Derek John Scott

Available for University of the Philippines System via Oxford Scholarship Online. Click here to access.

Finite soluble groups. حسب Doerk, Klaus

On products of normal supersoluble subgroups and generalisations حسب Perez, Edmundo R.

On equioptimal groups حسب Petalcorin, Gaudencio C. 1965-