Nikolidakis, E. N. “Dyadic-BMO Functions, the Dyadic Gurov–Reshetnyak Condition on [0,1]n and Equimeasurable Rearrangements of Functions”. Annales Fennici Mathematici, vol. 42, no. 2, Aug. 2017, pp. 551-62, doi:10.5186/aasfm.2017.4228.