1. General theory of radicals, II;Amitsur;Amer. J. Math.,1954
2. The hypercenter of functorially defined groups;Baer;Illin. J. Math.,1964
3. Group theoretical properties and functions;Baer;Colloq. Math.,1966
4. On group extensions and a problem of J. H. C. Whitehead;Chase,1963
5. Prescribing endomorphism algebras — a unified treatment;Corner;Proc. Lond. Math. Soc.,1985