Посилання:A new characterization of projective special linear groups L₃(q) / B. Ebrahimzadeh // Algebra and Discrete Mathematics. — 2021. — Vol. 31, № 2. — С. 212–218. — Бібліогр.: 16 назв. — англ.
In this paper, we prove that projective special linear groups L₃(q), where 0 < q = 5k ± 2 (k ∊ Z) and q² + q + 1 is a prime number can be uniquely determined by their order and the number of elements with same order.