@article{10_4064_sm_51_2_111_113,
     author = {Christian Berg},
     title = {On the potential operators associated with a semigroup},
     journal = {Studia Mathematica},
     pages = {111--113},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {1974},
     doi = {10.4064/sm-51-2-111-113},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-51-2-111-113/}
}