Geodesic
Local and true martingales in discrete time
Teoriâ veroâtnostej i ee primeneniâ, Tome 55 (2010) no. 2, pp. 398-405 
V. Prokaj; M. Rásonyi. Local and true martingales in discrete time. Teoriâ veroâtnostej i ee primeneniâ, Tome 55 (2010) no. 2, pp. 398-405. http://geodesic.mathdoc.fr/item/TVP_2010_55_2_a15/
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