Le secret de la pyramide
Diagrammes, Volume 18  (1987), Talk no. 2, 17 p.
@article{DIA_1987__18__A2_0,
     author = {Velpry, Christian},
     title = {Le secret de la pyramide},
     journal = {Diagrammes},
     publisher = {Universit\'e Paris 7, Unit\'e d'enseignement et de recherche de math\'ematiques},
     volume = {18},
     year = {1987},
     note = {talk:2},
     zbl = {0657.01004},
     mrnumber = {944791},
     language = {fr},
     url = {http://www.numdam.org/item/DIA_1987__18__A2_0}
}
Velpry, Christian. Le secret de la pyramide. Diagrammes, Volume 18 (1987) , Talk no. 2, 17 p. http://www.numdam.org/item/DIA_1987__18__A2_0/