@article{AIHPB_1985__21_4_305_0,
     author = {\'Emilion, R.},
     title = {Continuity at zero of semi-groups on {L1} and differentiation of additive processes},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {305--312},
     publisher = {Gauthier-Villars},
     volume = {21},
     number = {4},
     year = {1985},
     mrnumber = {823078},
     zbl = {0585.60046},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPB_1985__21_4_305_0/}
}