XXXIII: 15, 339-341, LNM 1709 (1999)
MORAYNE, Michał; 
TABISZ, Krzysztof
        A short proof of decomposition of strongly reduced martingales
 Retrieve article from Numdam
XXXV: 11, 158-161, LNM 1755 (2001)
KUCHTA, Małgorzata; 
MORAYNE, Michał; 
SOLECKI, Sławomir
        A martingale proof of the theorem by Jessen, Marcinkiewicz and Zygmund on strong differentiation of integrals
 Retrieve article from Numdam