Acciarri, Cristina, and Pavel Shumyatsky. “Varieties of Groups and the Problem on Conciseness of Words”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE (May 27, 2024): 23. Accessed March 3, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/6414.