[1]
I. D. Ivanyuta, β€œOn relatively free groups close to metabelian ones ”, Ukr. Mat. Zhurn., vol. 23, no. 1, pp. 93–96, Dec. 1970, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8486