A GENERALIZATION OF FIBONACCI GROUPS
THE LATTICE OF QUASIVARIETIES OF TORSION-FREE METABELIAN GROUPS
DEGREE SPECTRA OF RELATIONS ON BOOLEAN ALGEBRAS
E *-STABLE THEORIES
INITIAL SEGMENTS IN ROGERS SEMILATTICES OF Σ n 0-COMPUTABLE NUMBERINGS
A CRITERION FOR NON-SIMPLICITY OF GROUPS WITH INVOLUTIONS
VARIETIES DEFINED BY PERMUTATIONS