A remark on John-Nirenberg theorem for martingales

Libo Li. “A Remark on John-Nirenberg Theorem for Martingales”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 70, no. 11, July 2023, pp. 1571-7, https://umj.imath.kiev.ua/index.php/umj/article/view/6007.