@article{fpgftarxiv,
	author = {Riccardo Colini{-}Baldeschi and Paul W. Goldberg and Bart de Keijzer and Stefano Leonardi and Stefano Turchetta},
	title = {Fixed Price Approximability of the Optimal Gain From Trade},
	journal = {CoRR (ArXiv)},
	volume = {abs/1710.08394},
	year = {2017}
}