Lukashova, T. D., and M. G. Drushlyak. “Infinite Locally Finite Groups Groups With the Given Properties of the Norm of Abelian Non-Cyclic Subgroups”. Matematychni Studii, Vol. 62, no. 1, Sept. 2024, pp. 11-20, doi:10.30970/ms.62.1.11-20.