@article{10_4064_sm_110_2_115_126,
     author = {Jacek Dziuba\'nski},
     title = {Note on semigroups generated by positive {Rockland} operators on graded homogeneous groups},
     journal = {Studia Mathematica},
     pages = {115--126},
     publisher = {mathdoc},
     volume = {110},
     number = {2},
     year = {1994},
     doi = {10.4064/sm-110-2-115-126},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-110-2-115-126/}
}