@article{10_4064_sm193_1_2,
     author = {Piotr Budzy/nski and Jan Stochel},
     title = {Joint subnormality of $n$-tuples and
 $C_0$-semigroups of composition operators on $L^2$-spaces, {II}},
     journal = {Studia Mathematica},
     pages = {29--52},
     year = {2009},
     volume = {193},
     number = {1},
     doi = {10.4064/sm193-1-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm193-1-2/}
}