@booklet {neyman-cirgwtnosinckodp1997,
	title = {Cooperation in Repeated Games When the Number of Stages Is Not Commonly Known (revision of Discussion Paper $\#$65)},
	howpublished = {Discussion Papers},
	year = {1997},
	month = {1},
	publisher = {Econometrica 67 (1999), 45-64.},
	url = {{\textquoteright}},
	author = {Abraham Neyman}
}
