@article {MR2284014,
	title = {Optimal investments for risk- and ambiguity-averse preferences: a duality approach},
	journal = {Finance Stoch.},
	volume = {11},
	number = {1},
	year = {2007},
	pages = {107{\textendash}129},
	issn = {0949-2984},
	doi = {10.1007/s00780-006-0024-2},
	author = {Schied, Alexander}
}
