@article{ASCFM_1992__98_28_177_0,
     author = {Magnon, Anne},
     title = {Self-duality and {CP} violation in gravity},
     journal = {Annales scientifiques de l'Universit\'e de Clermont. Math\'ematiques},
     pages = {177--184},
     publisher = {UER de Sciences exactes et naturelles de l'Universit\'e de Clermont},
     volume = {98},
     number = {28},
     year = {1992},
     mrnumber = {1216679},
     language = {en},
     url = {http://www.numdam.org/item/ASCFM_1992__98_28_177_0/}
}