Banach Journal of Mathematical Analysis presents the best paper award yearly. The award in the year n is given to the best paper published in the years n-1 and n-2. The referee committee consists of selected editors of the journal.
Best Paper Award 2021
M. Cristina Câmara, Kamila Kliś-Garlicka, Bartosz Łanucha, and Marek Ptak
Banach J. Math. Anal. 14, 1558–1580 (2020)
The paper is Open Access (freely accessible)