@article{PSMIR_1989___S6_95_0,
     author = {Brousseau, Guy},
     title = {Le contrat didactique et le concept de milieu},
     journal = {Publications math\'ematiques et informatique de Rennes},
     pages = {95--101},
     publisher = {D\'epartement de Math\'ematiques et Informatique, Universit\'e de Rennes},
     number = {S6},
     year = {1989},
     language = {fr},
     url = {www.numdam.org/item/PSMIR_1989___S6_95_0/}
}