1. R. K. Amayo and I. N. Stewart, Infinite Dimensional Lie Algebras, Noordhoof, Leyden (1974).
2. V. A. Andrunakievich and V. M. Ryabukhin, Radicals of Algebras and Structure Theory [in Russian], Nauka, Moscow (1979).
3. K. I. Beidar, “Andrunakievich lemma and Jordan algebras,” Usp. Mat. Nauk, 45, No. 4 (274), 137–138 (1990).
4. A. Yu. Golubkov, “Constructions of special radicals of algebras,” Fundam. Prikl. Mat., 20, No. 1, 57–133 (2015).
5. A. Yu. Golubkov, “The weakly solvable radical and locally strongly algebraic derivations of locally generalized special Lie algebras,” Fundam. Prikl. Mat., 23, No. 2, 89–99 (2020).