@article{AIHPA_1977__27_1_31_0, author = {Borchers, H. J.}, title = {The generalized three circle - and other convexity theorems with application to the construction of envelopes of holomorphy}, journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique}, pages = {31--60}, publisher = {Gauthier-Villars}, volume = {27}, number = {1}, year = {1977}, mrnumber = {457777}, zbl = {0376.32009}, language = {en}, url = {http://archive.numdam.org/item/AIHPA_1977__27_1_31_0/} }