@article{PMIHES_1998__S88__165_0,
     author = {Polyakov, Alexander M.},
     title = {The wall of the cave},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {165--177},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {S88},
     year = {1998},
     mrnumber = {1667908},
     zbl = {0997.81103},
     language = {en},
     url = {http://www.numdam.org/item/PMIHES_1998__S88__165_0/}
}