Suha Jumaa, H.H.Ibrahim. The Othogonality of Martingale in Birkhoff’s sense and others. Tikrit J. Pure Sci. [Internet]. 2019 Mar. 18 [cited 2024 Jul. 3];24(1):112-4. Available from: https://tjps.tu.edu.iq/index.php/tjps/article/view/340