@article{RCP25_1976__23__42_0,
     author = {Borchers, H. J.},
     title = {The {Generalized} {Three} {Circle} - {And} {Other} {Convexity} {Theorems} with {Application} to the {Construction} of {Envelopes} of {Holomorphy}},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:3},
     pages = {42--80},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {23},
     year = {1976},
     language = {en},
     url = {http://archive.numdam.org/item/RCP25_1976__23__42_0/}
}