@phdthesis{BJHTUP11_1986__0183__P0_0,
     author = {Abergel, Fr\'ed\'eric},
     title = {Etude d'un probl\`eme de contr\^ole optimal convexe mal pos\'e},
     series = {Th\`eses d'Orsay},
     publisher = {Universit\'e de Paris-Sud Centre d'Orsay},
     number = {183},
     year = {1986},
     language = {fr},
     url = {http://archive.numdam.org/item/BJHTUP11_1986__0183__P0_0/}
}