@phdthesis{BJHTUP11_1998__0519__P0_0,
     author = {Ma, Xiaonan},
     title = {Formes de torsion analytique et familles de submersions},
     series = {Th\`eses d'Orsay},
     publisher = {Universit\'e de Paris-Sud Centre d'Orsay},
     number = {519},
     year = {1998},
     language = {fr},
     url = {http://archive.numdam.org/item/BJHTUP11_1998__0519__P0_0/}
}