Ivanov, Stefan, and Alexander Petkov. “The CR Almost Schur Lemma and the Positivity Conditions”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE 26, no. 3 (October 31, 2025): 1617-1637. Accessed February 20, 2026. https://journals.sns.it/index.php/annaliscienze/article/view/6116.