@article{ASCFM_1976__61_14_P5_0,
     author = {Hennequin, P. L.},
     title = {Introduction},
     journal = {Annales scientifiques de l'Universit\'e de Clermont. Math\'ematiques},
     pages = {5--5},
     publisher = {UER de Sciences exactes et naturelles de l'Universit\'e de Clermont},
     volume = {61},
     number = {14},
     year = {1976},
     language = {fr},
     url = {http://www.numdam.org/item/ASCFM_1976__61_14_P5_0/}
}