1. K. Baker,Equational classes of modular lattices, Pacific J. Math.28 (1969), 9–15.
2. K. Baker,Equational axioms for classes of lattices, Bull. A.M.S.71 (1971), 97–102.
3. D. Bean, A. Ehrenfeucht, andG. McNulty,Avoidable patterns in strings of symbols, to appear in the Pacific J Mathematics.
4. A. Birjukov,Varities of idempotent semigroups, Algebra i Logika9 (1970) 255–273.
5. G. Birkhoff,Lattice Theory 3rd edition, Amer. Math. Soc. Providence, 1967.