1. [1] R. K. Amayo, Soluble subideals of Lie algebras, Compositio Math., 25 (1972), 221-232.
2. [2] R. K. Amayo, Infinite-dimensional Lie algebras, Ph. D. thesis, University of Warwick, 1972.
3. [3] R. K. Amayo, Locally coalescent classes of Lie algebras, Compositio Math., 27 (1973), 107-117.
4. [4] R. K. Amayo, The derived join theorem and coalescence, Compositio Math., 27 (1973), 119-133.
5. [5] B. Hartley, Locally nilpotent ideals of a Lie algebra, Proc. Cambridge Philos.Soc., 63 (1967), 257-272.