@article{10_4064_ap85_1_6,
     author = {Jolanta Olko},
     title = {On semigroups with an infinitesimal operator},
     journal = {Annales Polonici Mathematici},
     pages = {77--89},
     publisher = {mathdoc},
     volume = {85},
     number = {1},
     year = {2005},
     doi = {10.4064/ap85-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap85-1-6/}
}