1. M. Suzuki, The Structure of a Group and the Structure of the Lattice of Its Subgroups [Russian translation], IL, Moscow (1960).
2. M. Goto, ?Lattices of subalgebras of real Lie algebras,? J. Algebra,11, No. 1, 6?24 (1969).
3. Yu. N. Mukhin, ?Projections of connected groups,? in: Eleventh All-Union Algebraic Colloquium [in Russian], Kishinev (1971), p. 65.
4. L. N. Shevrin, ?Elementary lattice properties of semigroups,? Sib. Mat. Zh.7, No. 3, 664?684 (1966).
5. M. I. Kargapolov, ?On the elementary theory of lattices of subgroups,? Algebra Logika,1, No. 3, 46?53 (1962).