@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://www.numdam.org/item/AIHPA_1977__27_1_31_0/}
}