IVANOV, S.; MINCHEV, I.; VASSILEV, D. The optimal constant in the L² Folland-Stein inequality on the quaternionic Heisenberg group. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 11, n. 3, p. 635-662, 2012. DOI: 10.2422/2036-2145.200211_002. Disponível em: https://journals.sns.it/index.php/annaliscienze/article/view/275. Acesso em: 20 feb. 2026.