@phdthesis{BJHTUP11_1986__0190__P0_0,
     author = {G\'erard, Christian},
     title = {Propagation de la polarisation pour des probl\`emes aux limites},
     series = {Th\`eses d'Orsay},
     publisher = {Universit\'e de Paris-Sud Centre d'Orsay},
     number = {190},
     year = {1986},
     language = {fr},
     url = {http://www.numdam.org/item/BJHTUP11_1986__0190__P0_0/}
}