@article{AIHPB_1974__10_1_155_0,
     author = {Horowitz, S.},
     title = {Semi-Groups of {Markov} {Operators}},
     journal = {Annales de l'institut Henri Poincar\'e. Section B. Calcul des probabilit\'es et statistiques},
     pages = {155--166},
     publisher = {Gauthier-Villars},
     volume = {10},
     number = {1},
     year = {1974},
     mrnumber = {367154},
     zbl = {0295.60053},
     language = {en},
     url = {http://www.numdam.org/item/AIHPB_1974__10_1_155_0/}
}