@article{GMJ_2003__10_2_50819, author = {Mania, M. and Tevzadze, R.}, title = {A unified characterization of -optimal and minimal entropy martingale measures by semimartingale backward equations.}, journal = {Georgian Mathematical Journal}, pages = {289--310}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {2003}, zbl = {1040.60058}, language = {en}, url = {http://geodesic.mathdoc.fr/item/GMJ_2003__10_2_50819/} }