Shirvanyan, N.V. and Shirvanyan, V.L. 2006. AN IMBEDDING OF FIBONACCI GROUP $F(2,9)$. Proceedings of the YSU A: Physical and Mathematical Sciences. 40, 1 (209) (Mar. 2006), 142–144. DOI:https://doi.org/10.46991/PYSU:A/2006.40.1.142.